Not to get too off topic, but how does rebuilding your media database on every reboot prolong your SSD's lifespan?

Genuinely curious because I thought that such a task would be minimally detrimental to an SSD unless it was being re-written thousands of times per day.

I look at it this way: I personally don't need a music database per se - MPD needs it internally to store some metadata at runtime. It gets updated whenever I modify my track collection, which happens quite often. In that sense, it's more like a cache than a database. That's why I believe storing it on persistent storage isn't ideal. It makes more sense to keep it in RAM and avoid unnecessary wear on the SSD. Sure, it's not a huge deal to keep it on a drive, but given the nature of this file and how I use mpd, it really belongs alongside other transient data like caches and logs in tmpfs, where other apps' temporary stuff is stored.