Strange, after playing for a bit and making a new save, now I can play the game fine with the sga_ files in place, no need for me to delete them now.
I guess maybe it had something to do with where I saved it before? Unfortunately can't remember where my save was when I was getting the crash, will have to try checking some older saves.
If this is the case I guess it should be added to the article? Since this'd mean you don't need to delete the sga_ files each time, just delete them once, load in, and save in a different location. I'm still not completely sure the location is what caused it though...
EDIT: aha, found my old save and yep, the crash still happens with it, so I guess that must mean the problem is location-based?
For reference, my chara was located at the bottom-left of the "N" in "LEMOYNE" on the map: hxxps://i.imgur.com/JpDeq7D.jpg (can't post URL for some reason...)
Would be interesting to see if anyone else gets an error there with the cache in place.
E2: Loaded my crashy save with sga_ files deleted, moved to a different area and saved game, then restarted with sga_ files from last run, and it loaded in fine!
Added a mention about needing to relocate to the article, would still be nice if someone else can try saving at that location I posted and see if they also get a crash in Vulkan mode though.