Fleet is just a shell with rudimentary syntax highlighting for some languages and an LSP support. It can switch to “full editing mode” (or is called smart mode?) and then it will engage IDEAs code processing.
It looks like they decided to butcher their own plugins and code tools for this: https://docs.google.com/spreadsheets/u/1/d/e/2PACX-1vTWt9RlJPfIJwD5H7Gsqbu9xHTd-K1oj_zCpP6YIQq8xvjARDYqC6OnVIVt5WPi2-B-vWHZw5qMnhvx/pubhtml?gid=0&single=true
Then it seems they want a centralized approach where they take care of core languages, offering a better quality out of the box compared to vscode that is mostly plugins by users. The problem of course is the fact that a lot of languages will not be supported.
I encourage everyone to go to https://youtrack.jetbrains.com/issue/FL-17030/Elixir-support-with-LSP and express their desire to have Elixir included.
Maybe once critical mass is reached, JB will adapt.
