I have a bunch of automation related stuff that I never got around to using. 25gal kettle that's 2 or 3 years old that's never been used. A partially welded frame for a 1/2BBL single tier brew stand, again, sitting around for a few years. Likely never to be finished but I don't want to get rid of it.
I doubt the 20G system ever happens at this point, if I do finish it I'll likely just turn around and sell it. I already started getting my 2 gallon system together, also hasn't been touched since early this year. That will probably sit around for a few years, too, then I'll be in the same place, wondering why I bought all this crap.
Tons of pipe fittings, stainless and brass.
20+ kegs
Hundreds of bottles. I've only bottled about 2 cases in the last 10 years.
Lots of random labware that's never been used. Probably destined for the trash.
I'm going through a major cleanout of all non-essential items this fall. A lot of this brew stuff will be gone come January.