I love platformio too. We have another extension that can be used with platformio. This isn't really documented yet, something I'll be fixing next month.
https://visualstudiogallery.msdn.microsoft.com/35dbae07-8c1a...
There is far too much 'bad aji', if you know what that is .. in the way that Microsoft is handling all of this. You are proving a bitter point, for those of us who have been watching for 30 or so years, which is this: Microsoft is still up to its old tricks.
So, no thanks..