I can't be doing with the strapping loads of stuff to the outside either. I'm usually quite disparaging of it, referring to it as the tinker approach. In winter mats sometimes get strapped to the side but that's about it. Sometimes my golok bag goes up the side, but that's too temporary and specific to count here I think.
I was reminded how much it sux last winter with what I think is perhaps the worst case. My playmate showed up with her sleeping bag lashed underneath inside a bin bag. [If ever there was something I wouldn't want vulnerable on the outside of my pack it would be my sleeping bag. It is also the thing I see most often strapped to the outside of a pack, maybe because the pack is too small, but far more likely because of the plethora of crud sleeping bags that don't compress well enough to fit inside]. After a few days she suffered all the pitfalls I remember from long ago; the battered bin bag, the sleeping bag annoying the buttocks and legs while walking, the endless straitening it up and re-doing the bungees, the constant fear of it getting wet... .She will be much better armed for this winter. She's learned it in a way words cannot convey.
A lot of the Euro guys use pretty simple packs, too. I am not really up on what you guys are using these days, though.
British isssue PLCE is plain compared to some of the kit I've seen. Yeah, it's got extras like the ability to have the side pockets off and yoke them up as a day pack, but the format is still fairly classic. You do see some of the more exotic stuff occasionally,
there's a couple on here, but they aren't so common amongst professionals as one might suspect. The biggest propellant here has been the RM. Back in the day of external frames the best was the Karrimor Arctic Marine units had in Norway, and more recently RM popularized the Berghaus Roc, a very simple climbing sack. Even the current PLCE bergan with the bells and whistles can be traced back directly to the popularity of that simple sack with a decent back system.
Helluva image. Cool.