I have 1 in "440C equivalent", one supposedly in 440C ... the package, manufacturer's website, and ads claimed "440C!". The blade etch however, proclaims "440A". Three with CPM154, (all Buck: the 2018 Forum knife, and two SK Blades 110's) and one Buck 110 with S30V. I'm not sure if it qualifies as a "Super Steel", but have one 110 with 5160.
I like them, but to be honest they don't cut/slice as well as my 440A/420HC/1095 bladed knives.
The primary reason being my knives with these "lesser" (note quotes) steels will take and hold an acute 10 degree per side/20 degree inclusive edge without chipping or rolling.
From everything I've read on Blade Forums, the "super steels" require a minimum obtuse 15 DPS/30 degree inclusive or even more obtuse 20 DPS/40 degree inclusive edge "to prevent chipping". With the possible exception of 5160, they are run hard enough that chipping is more likely than rolling if the edge is "too acute" (whatever that is ...)
I have taken them to 12~12.5 degrees per side/24~25 degrees inclusive using a guided rod sharpening system. (made a slot half way between the 10 and 15 degree slots). I'm a bit fearful of making them any more acute than that.
Yes. A mere five degrees can and does "make a world of difference" in cutting/slicing performance.
Do I
"need" the "super steels"? Nope. Sure don't. Not even the 440C, which is/was the original abrasion resistant "super steel", to be honest.
1095/440A/420HC and other steels of the same class(es?), and even Buck's 420J2, have always served me well, even when misused for scraping off automotive gaskets, cutting radiator and reinforced hose, up to 8 gauge electrical wire, using the secondary as an awl/scribe on steel and drywall, or cutting linoleum or carpet. (when possible I did use a utility box knife for drywall, linoleum, and carpet ... and cardboard, when I had a bunch of boxes to break down ... rather than my good knife.)
Why did I get the "super steel" knives? I liked the knives, and wanted to see what all the hype was about.

Oh, I got the "440C" to see if it was any better than I remembered from my teen years. About the only pocket knives in my area that
didn't claim 440C blades were the various Schrade brands, Utica, Colonial, and Western. Even the sub $2.⁰⁰ gas station specials had "440C" stamped on the tang! Needless to say, the heat treat varied from "what's that?" to "forget sharpening it without a file, grinder, or belt sander." (SiC and Diamond stones/plates hadn't been invented yet.)
Do I anticipate getting a knife with a later "super steel"? Nope. No need to. I already have more knives than necessary to last the rest of my days - even if I wore them out/down to toothpicks one at a time over 3 or 4 years of consistent use, like our grandparents and great grandparents, and their parents, grandparents and great grandparents did.