I think, nostr has solved the public social tech problem to the extent where now it's MOSTLY a marketing problem.
What nostr has not solved yet is the private social tech problem, we're getting there with MLS as a replacement for signal, but we also need a replacement for Instagram or Facebook, a place where only "friends or family" see your posts.
Olas is not it. It's just a public social with images. Also Nostr CAN definitely solve this, it's not a technical limitation, just a little more work than simple kind 1 notes.