So after updating to 15.4 I had a good day yesterday where everything seemed to work until I kept getting "storage full" notifications. I went into settings and erased a ton of podcasts (12GB worth) to make space. Eventually the phone was totally unable to even scroll so I had to restart. Every restart had something broken (no cellular service, or images missing) and eventually I got almost everything working. It finally works at the bare minimum and all my photos are gone.
Updaters beware who have smaller sized storage phones.
Updaters beware who have smaller sized storage phones.