"What, I can't get rid of that, I'm going to need that someday! No, I can't get rid of that either, I like having that."
That's my thought pattern a lot of times when trying to downsize.
It can definitely be a struggle, especially when you actually do use stuff once in a while, like your bargain thread.
I'd have a rough time moving into a tiny house because half of my crap wouldn't fit, especially the big stuff like speakers and amplifiers...