I had a moment looking through my collection/want lists last week. I wondered when I was going to use, or even read, all of these books. Once I realized that the answer is never, I decided that 2020 is going to be a nice even cutoff point. Do I need new Call of Cthulhu material, or is all the material from the first 40 years enough? Ditto new OSR material, or GURPS, or whatever. Even if there were to be something great, I have enough material to weave any tale I want to already. That realization allowed me to break the FOMO quite cleanly. I even canceled a pledge for a current Kickstarter that won't show up until who knows when!

After December, I'll still buy new material for the few things I think are truly exceptional (Harn, Design Mechanism's Mythras line, ... that may be all) and I'll keep searching for the ever shrinking want list of older material. And perhaps I may part with a few things, but that's down the road.

It feels good to have closure, of a sort.

I've always leaned more towards the non-TSR than TSR, and the same goes with WotC.
The problem I have is that some of the small press stuff is exceptionally good.
The Swordfish Island stuff for example; and maybe some of the stuff put out by Greg Gillespie, or some of the adventures from Zzarchov Kowolski.

Aside from that, the hardcopies of most of the uncommon and rare collectable seem to hold their value more than a lot of things. Certainly more than cash in the bank. So if you're going to save, saving in rare RPGs seems to be as good an most other things, and the market is pretty liquid.

I'll never get through reading a lot of what I have, and I doubt most collectors will ever be able to read their way through their collections, even with imposed Covid isolation.