I like aluminium because I like simple and lightweight stuff when it isn't essential that it is anything else.
I've not bought into the stainless steel bottles thing for a couple of reasons. 1] They strike me as being pitched at the picnic or day hiker that wants to boil water in a their bottle. If I want a single bottle of hot water for a day I'll save myself some hassle and take a vacuum flask. No extra paraphernalia required. True, in the event of something adverse I could reuse a stainless bottle to harvest water and boil in it in a way I couldn't with a vacuum flask, but realistically I think I stand more chance of being drowned by squid than needing to do that. I'm extremely unlikely to get lost on a trail walk or picnic. 2] They strike me as terribly impractical for anything more than the most casual of events. The weight would start to rack up real quick using multiple stainless bottles. A more sensible solution for me is to carry water in the kind of bottles water comes in or kiddies fizzy cola plastic pop bottles. Those used in conjunction with a dedicated kettle allow me all the flexibility I need and provide a very light solution. Water is heavy enough as it is so I don't want to be hauling excess packaging for it. True, one may break, but one never has yet and I do this a lot and have been for quite a while. I have more confidence in the integrity of them than I do water bladders and many people seem not to give a second though to how robust they are. Plus, recall this is a multiple bottle solution, so in the unlikely event that one does ever break so what. The only case that I'll entertain against them is they lack kudos. They look cheap and they are cheap. I can get my head round that if it shaves off pointless weight. I can then indulge myself with my dedicated aluminium water kettle, and I like that. I prefer to take my water from something that isn't tantamount to drinking from a saucepan for a few reasons.
I also enjoy aluminium Trangia pans. They're light and non-stick. True enough the non-stick doesn't last forever but why would I care about that. It lasts long enough if you're sensible with them. I use Lexan spoons so that helps a lot. I guess those of you into carving wooden spoons could get similar longevity from them.
Even uncoated aluminium pans work just fine. Below is a pic of some plain aluminium pans I used for nearly a week a little while ago. I brought the stove and the fuel and mah women brought her basic aluminium pan set. No problems. I figure you're not much in the way of a cook if you can't make those work. For an Englishman it would be like calling yourself a driver when you could only make left turns. A cook can cook with all sorts of non-optimal kit. Simple as that. Swapping out for Titanium would make little if any improvement. I enjoy the light weight.
The toxicity of aluminium doesn't concern me at all. I don't use aluminium at all domestically, and even though I get out a lot I think my exposure to anything harmful is well below anything I'd consider a threat. I've got it pegged right along side the BPA boswellox. Besides I've got bigger fish to fry. I am what the filth calls a sophisticated drug user I get through a bunch but I am no threat to myself or anyone else in the process. That said, I do wilfully consume substances that science fact demonstrates meddles with the dopamine pathways. At one end abuse could lead to Schizophrenic symptoms and at the other end symptoms of Parkinsonism. I believe at my current consumption rate I'd have to live many lifetimes for it to cause me a problem. Still, I am aware the risk is not zero and I persist. To behave in such a way yet swerve aluminium because my water kettle might be poising me would be a reasoning I would find abhorrent. I'm not getting into that aspect any further, but that is my candid response, full and frank.
Last, an account of how I've done a sort of circle: Moons ago I had a mate from a bike club that wanted to get into outdoor stuff and was constantly after advise on bits of kit. Despite what I was telling him he had a penchant for army surplus, specifically East German stuff. He had that Raindrop pattern everything; clothing, nasty old pack, you name it. Utter shite. I watched with some hilarity as he added powder, then more powder, then even more powder to water in a flimsy looking East German mess tin in an attempt to make scrabbled egg with powdered egg. He got a watery yellow soup to drink. It all seemed to hang together nicely. His clothes were rubbish, his kit was rubbish, and his food was rubbish. At some point he stood on his mess tin and it just buckled. Again, I dismissed that as hanging together great with the rest of his rubbish. He even announced his own disappointment with his mess kit calling it like compressed aluminium foil and vowing to get a heavy duty tough set. That always makes me smile because years later I find myself often using those heavy duty aluminium disposable roasting trays as uber-lightweight pans when I don't want to carry multiple proper pans. They work great and they are even more flimsy than his old East German surplus kit. I think I made a mistake. I think I tarred his flimsy aluminium pans with the same brush as I did the rest of his kit unfairly. The problem wasn't the pans at all, the problem was he was a clod.