Studio is still being developed and is live, though it’s not reliable enough for mission critical work. Still very buggy and quirky.

I wish apps like InVision Studio and Framer X would focus less on being a place to do all your designing and more on being a really powerful prototyping tool. I don’t want a half-baked Sketch replacement.

I've only had minimal experience with InVision Cloud, which our designer used and seems to be similar to Drama. But being web-based it's not limited to Mac.