There are too many sets and spoiler season never ends. I mainly just follow now in case there are any good singles for updating my cube

Quite a few, actually

• Artisan Keycap collecting, to a lesser degree mechanical keyboards (I usually use them as displays to showcase my artisans)
• Boardgame collecting and playing. I'm a big fan of modern area control games. Also trying to design some. Slowly.
• I curate a magic the gathering commander cube. Hopefully mtgcube gets a community somewhere around here
• Reading, lots of fantasy there.
• EDM shows and festivals, recently. Probably have been going to too many, but I always jump in with both feet

You could check out Kingdom Death: Monster. You could use many of your 40k minis as your survivors, and it would come with a ton more minis to build and paint. Alternately, you could try to find somebody selling the game for cheaper without minis, and only use 40k minis in the game.