Random features that seem technically difficult to add but could be useful (ranked in descending order of usefulness):
1. Memory and multi-chat context would be nice
2. Agent mode / real visual browser
3. Compaction
4. Deep research
5. Private chats for deleting throwaway chat UX
6. Weird OpenAI reasoning levels like xhigh or minimal
7. Apps / connectors
8. Folders
9. Combined credit system so standard/premium can both be used for higher limits by combining them and so shorter chats actually use less limits than longer ones
10. Artifact-like stuff
11. Smart cards for image search results, stocks, maps, ect.
12. Voice Mode would be pretty cool too
13. Custom instructions - yes, I know you have the "Anything else" and "Traits", ect. But for some reason I didn't see just a general instructions area
14. Skills
15. Tasks / Reminders
Just some thoughts, and even just a few of these would be awesome. lmk