headwinds:

signer extensions barely maintained, this blocks 80% of potential users right out of the gates. native apps that store the nsec are both frowned on, and used the most.

ndk and nostr-tools, notoriously hard to work with. somehow they have often programmed in a 'fire and forget' strategy for event and sub handling, that is very difficult to do anything serious or access the underlying logic. many bugs, and unfortunately i think a lot of dev time is wasted picking a bad path through this.. (hint: start with a different sdk)