But wouldn't this help?

You have 10 containers, slap a marker on one every time you take something out of it.

12 months later you have 2 containers that haven't been touched (zero stickers). -> 80% reduction of the amount of stuff to comb through to find unused/useless cruft.

I sorta know the stuff I use and don’t use. Had a kitchen fire last year and had to get the whole house emptied out for smoke damage mitigation. I’ve thrown out, donated, or recycled the better part of two large dumpsters worth of stuff.

For me it’s about getting into the mode of going through and parting with stuff.

Well, what is the hard part, then?

The second sentence should read “is” not “isn’t?”