I have the same thing when it comes to the problem solving side of things. Then moment it’s done I lose interest. I think that’s why I seem to collect test gear. It’s usable afterwards to fix other things. Unfortunately it’s like a snowball rolling down a hill, picking up more oscilloscopes as it goes.
I really like old cruddy Heathkit stuff that has been badly assembled. That’s a world of masochistic fun to get working again
What I’d kill for is an unassembled Heathkit television.