> Instead of collaborating though I see IntelliJ continuing on the path of their custom implementation.
I haven't checked in a while, but RLS was sub-par for a long time (feature- and latencywise). Tight integration has its benefits if you can afford it (and apparently they can). So I guess as soon as they can get the same properties from RLS as from their own implementation they'd switch. But if it meant having to rewrite a lot of stuff that suddenly also becomes available to competitors that seems like a dumb move.
I haven't checked in a while, but RLS was sub-par for a long time (feature- and latencywise). Tight integration has its benefits if you can afford it (and apparently they can). So I guess as soon as they can get the same properties from RLS as from their own implementation they'd switch. But if it meant having to rewrite a lot of stuff that suddenly also becomes available to competitors that seems like a dumb move.