Stuck in the 90s
I have a lot of nostalgia for 1e/2e AD&D, basic D&D and OD&D. Out of all the rules, there's only one that keeps me from playing it ever again: Descending armor class. Everything else I can deal with. I'm never going to put up with the attack roll -- the most basic roll in the entire game -- being even slightly more complicated than it is in 3e+. I don't care if the DM is willing to completely handle the charts or run THAC0. It's not happening.
We made these little custom blocks where you would write in the AC you would hit based on what showed up on the d20, so there was no math involved, but your point is completely valid nonetheless haha.