I played a bit with #Obsidian. Turns out that its #iOS app has some serious problems with large vaults. For instance, it took 1:10 min to retrieve a desired note (including app starting time). The app even ran into a freeze-crash-restart loop and became unusable. I summarized the details of the test on my blog: https://www.fabriziomusacchio.com/blog/2023-01-22-obsidian_mobile_and_large_vaults/
I'm wondering if someone has a temporary workaround for this problem, until it gets potentially fixed in some future app releases?