... environment What s been harder than expected than the stack itself is everything around it: auth + permissions are getting complex fast (especially with multi-client setups) data pipelines + syncing are way harder than expected deciding what to precompute vs calculate on demand is still an ongoing trade-off Feels like the product isn t just build features it s designing a system that stays manageable as data + clients grow. Curious how others handled this: did you optimize your data layer ... ... tattoos or mockups) Tech-wise I m using: Flutter for the mobile app Firebase (Firestore + functions) OpenAI + Replicate for image generation (testing multiple models right now like DreamShaper, Flux, Ideogram) Biggest challenge so far has been balancing quality vs