Some rough spots:
- No canonical http client. There are a few attempts at wrapping libcurl but nothing complete and well documented yet. However, the creator of Joy framework for Janet does have an http client library.
- The main http server circlet is MIT licensed, but it is built on top of Mongoose, which is GPL/paid commercial. Something to be aware of if you want to distribute binaries made with this library.
- I have never been successful getting any of the UI or drawing libraries to work.
- Naming of packages is a bit confusing even if you have watched the Good Place and are aware of all of the inside jokes.