I really want to use helix but was turned off by the lack of Copilot support and the developers' contempt and holier than thou attitude towards people who use AI assisted coding.
There is an open PR for getting copilot support, though it's currently just a hotfix and likely won't be accepted into core. You can still patch your own version and compile it.
https://github.com/helix-editor/helix/discussions/4037#discu...
And the plugin system is not done/released yet.