The 3DS is dead at this point, and Nintendo shut down the online shop. I have a 3DS with a bunch of digital games I purchased and downloaded onto the device that I haven't gotten around to playing yet (mostly JRPGs, because 40 hours a pop is a tall order). If my 3DS dies and all the emulators disappear, I'm outta luck.
Time to start lobbying Atlus for a Radiant Historia Switch port, I suppose...
Citra already fully supported every notable 3DS game, I think, and recent development work has mostly come from outside contributors rather than Tropic Haze.
https://archive.org/details/citra-nightly-2104
I understand this is a repository of backups too:
Wayback Machine also saved them if you use it on the nightly release page
Some more here: https://news.ycombinator.com/item?id=39594795
Yuzu emulator developers settle Nintendo lawsuit, pay $2.4M in damages
With an emulator?