This is a VERY narrow use case, but if I can save someone the frustration I went through that will be my good deed for the day. :-)
If you have AppleScripts that manipulate the task state filters of perspectives, that functionality only exists for built-in perspectives OF3. You can’t cycle through task state filters on homemade perspectives. relevant thread
If you have a large database (>200 projects and/or >5000 tasks), search on iOS can degrade to the point of being unusable. Each key press takes >1 second to register at 200p/5000t and increasing to 10 seconds per keystroke at >10k tasks. Spotlight search still works but native searching is shot. relevant post
