Tough one - I don’t have a hard cutoff, but I’ve certainly started to slow down on buying retro games. I’ve spent over $200 CAD on a single game in recent memory (2022?), nowadays I wouldn’t really want to go over $100 CAD.
I’ve also been reevaluating and selling off some of my collection whenever I can buy ports / digital versions of some games (eg: Chrono Trigger, bought on Steam and sold my loose SNES cart, Xenogears bought on PS3 and sold my CIB copy, etc).
I only focus on two retro systems - SNES and PS1 - and I don’t really play on OG hardware anyways (Super Nt / Pocket for SNES, PS3 / Vita for PS1), so I don’t mind “owning” digital and ultimately downloading roms if necessary.