Platform exclusivity should be discouraged, not praised. If I can't use the software then their supposed benefits of being native don't do me much good.
I think one the issues here was that sketch started as a very small indie mac app. In the case of one or two developers working on a niche product, exclusivity is forgivable. The problem is that sketch got way too popular, way too big and took investment and are now expected to compete with a competitor like figma.
Which is fair enough, my point is I think it was a mistake for Sketch to even put itself in the same ballpark as Figma and raise investment. It could have stayed as a niche tool and likely supported a small team.
