* Database backups for: Closedverse (& dev server), Cedar (FULL! without anonymization), Indigo dev source and DB (sadly I think one or the other was accidentally deleted by me at some point), Indigo prod incremental backups
* … Probably more.

Q: Anything else you found unrelated to Miiverse/clones?
I mean, yeah. I had backups of all of my machines from 2015 onwards, and Skype archives, and...
Honestly, I haven’t had enough time to take a deep dive into it.
I hate to say it, but I can’t give a great answer to this.
I do enjoy having old iPhone photo albums from before this time, however the moment I noticed there was a big gap between late 2017 and early 2019, I don’t know, it kind of made my mood about it fall.
There’s some gaps in my archives, such as the fact that I copied a lot of files using the Linux copy command without preserving dates, and the fact that a lot of my files now don’t have proper timestamps, it really ruins some of my feelings about them.
Now in terms of hardware, I had lots of old ThinkPads, but, at this point, I don’t even see them as anything special. The older I’ve gotten the more I’ve wanted to play with the new stuff rather than the old stuff. The newest ThinkPads here are Intel Nehalem laptops, and not only have ThinkPads become so much more cliche from that time to now, but I can’t see it as any more than old hardware.
I also had a Chromebook with Coreboot (also put it on an x60 but reverted it for some reason). I used to be all over that combination, since I thought Chromebooks are so light and efficient and Coreboot is so cool… but, at this point I’ve taken the “you will never have open source firmware and if you want it you have to spend like thousands of dollars on a specialized kind of product just for it” black pill, and binge bought an ARM Windows laptop at some point. I’m fine.
Then there’s my home server, with an i5-6500 and 32 GB of RAM. Is it nice? Sure, but at this point, I’d rather take a more efficient computer than a more powerful one. 🤷. 
Not like I’m hosting a website anymore that would justify that amount of power anyway.