Expanding lore for towns that might be thrown away I think is a good use.
Feed it a few notes you want to make sure get included, drop some hooks you like and let it weave it in.
Something I always struggle with is deciding which NPCs are "expendable" Bec once I write a story for them I don't want them to die, because I know my players won't remember them fondly but if it's AI slop stories then it's fine.
Edit: I'm building for DnD/TTRPGs if that's not obvious
Get an unlocked Google Pixel A series.
Google has been very good about making their pixels repairable and open to tinker with while also not sucking like a dedicated libre phone would be like a Pine phone.
Unfortunately it does come stock with AI bullshit, but that's going to be a problem anyways unless you buy a phone not getting security updates.
However, Google made these things so open you can flash a new OS on it that does respect privacy like GrapheneOS of Calyxos if you're willing. I highly recommend looking up some video tutorials on it to see if you're able to do that or willing to try.
In my opinion that's the best way to get a modern "premium" phone feel and also not have all your shit is data mined all the time.
Worst case it's pretty easy to not use AI stuff on a Pixel. I have avoided it on my work phone for a while. It's not annoying about it. Well, it might be, but it's sending the annoying stuff to a Gmail I don't use.