Yes, I can't resist salvaging and find it hard to throw things away - I look at something and think "what can I use that for?".
Years ago, there used to be shops and market stalls specialising in junk, especially WW2 reclaimed parts, and mysterious circuit boards.
Exchange and Mart full of 2-way radios.
I still look at PCBs from duff equipment and see if anything is worth recovering, but realistically, there never are, given the effort to get them off the board etc.
It's hard enough keeping track of new components and containers from TicTacs to pocket money envelopes come in handy, plus a large Excel spreadsheet to try and locate the stuff.
The only things I regularly strip for bits are old printers for motors and gears, but HHDs so far have never yielded a motor.
I always remember my first successful electrical experiment with an Ever Ready cell, some fuse wire and a bulb - hooked for ever.
I still rifle through skips and the other day found a 6-ft Stabilo level chucked out because it was slightly bent. Leaned it against the wall and applied some pressure. Job done, now have a £40 level to add to the collection.
I think salvaging and possibly hoarding goes back to times when things weren't so easily available, but I must agree with @westfw, there comes a time when you have to stop and a possible house move is going to force some hard decisions.
On the other hand, buy a bigger house and get more junk room.