Only if there is actually a chance of ever using them again. And to be fair, my drawer of old power supplies came in handy when a lightning strike hit my house - I was able to replace a couple fried power supplies.

I have the requisite box(es) of cables and some power supplies. These do come in handy now and again. I moved in 2021 and had to recycle a staggering amount of old tech. While I regret some of that, I'm trying not to because hoarder anymore.

I buy 10 "recertified" versions of it to use until I die. A dozen T470 laptops which are the last to support dual method charging, would have cost 15k when new, about $1500 to buy 12 now. VIZIO non smart lcds connected to anycast receivers. Android 7(IMO the peak of android os) devices that require no online activation. original apk files, core 9 and under CPUs, DDR3 and DDR4 RAM.

Personally, I keep old cameras because they still work (the Hasselblad) or the lenses can be used with the latest camera (Nikon-Z with FTZ) I did optical engineering, so they have special meaning.

I keep some mac minis for linux (when I get the time), one old imac to manage the music on ancient ipods that don't seem to be manageable with newer computers, the Cube, because there ain't nothing like it [0] and the IMSAI that is too much trouble to ship even to computer museums, and certain ones, no CHM of Mountain View in particular, don't think it "classy" enough to take. No computer superhero autographed it, I guess.

I have lots of electronic parts and hardware bits that I don't think I'll ever need.

I found over the last 10 years alone, that I spend most of my time just USING computers, with the piano and photography. What I have done is the best guide to what I will do, and need, moving forward. Piano alone could take all my time, but it's for fun/enjoyment, not an obsession or profession.

Everything is under review for the next move.

TBH, in terms of "wasted space" furniture is still more of an issue.

[0] When the capacitive power switch dies, I guess that goes. unless there's an easy hack that I missed. No, I don't intend to turn any computers into fish tanks.

I was big on keeping cables. I cleaned up a little, but still have a lot of them. Some of the old ones, or adapters, can be hard to find and I never know when they might come in handy.

Other stuff, not so much. Though I do still have my old G4 iMac I keep meaning to setup again.