I think this sums up how I’m feeling here all too well.
I don’t care if R6 is buggy, or if it doesn’t support new features. When I make a game and choose to force R6 I make the conscious decision to accept all the glitches and outdated tech that comes with it in order to make a game with the classic aesthetic. I personally have never noticed nor been bothered by any of the issues supposedly caused by R6 and so I only ever used R15 for games that needed realism.