vendor lockin + slow network calls (+ GitHub is down sometimes). if you want to search over hundreds of issues, `gh search` isn’t bad but you can do a lot better with a filesystem or embedded database
that said for work I use GitHub and have CC make use of the gh CLI, works great. but I have wanted some sqlite/duckdb tracker you could just commit, maybe with back and forth between markdown files. also GH projects are pretty slow/clunky