I suspect JetBrains will never limit this. I've yet to recall anything in the past where they have done this even when they have a similar offering.
In fact, their own AI extension appears to be pluggable in and of itself. I think they see the value in being easy to adapt different AI solutions to rather than trying to only provide their own.
>>no_wiz+(OP)
JetBrain's main business model depends on buying the editor, and if users still see the overall editor better, any AI plugin support will likely just increase the sales.