Somewhat ironically, as a frontend dev, I've never met a UI designer that really convinced me they were in-tune with designing for the context. If Figma did a better job of enabling them to design as well as they possibly could for the web or android or whatever they were working on specifically, then that's what I'd get behind. For ne personally, there was always a limitation in how the tools let me design for the responsive web, as well as letting me apply graphic design principles in a way that actually worked for that context. The best I ever got from a designer, even if I could admit that they were much better than me in terms of design skills, it was always hard to tell what was the reason they wouldn't be able to provide a mobile-first design that made sense. It was always some ridiculous large screen layout that they expected me to rethink in order to map it to various sizes.

For starters, it is far more faster, and it is not in the browser. I use design tools mostly to throw in some interface mockups, and I work alone, so I don't benefit from Figma's killer features of concurrent multi-user editing and its availability on multiple platforms. One other big feature Figma has is it's approach to multi-point vector shapes, it is useful when designing some icons, but not enough to outweigh a general drop in performance.

I also like that in Sketch I can control the app and not be dependent on some remote server to do the work, especially if server owners are prone to cancelling service without valid reasons - Recently Figma has announced that it will be unavailable to Russian people, regardless of their political views, which is rather ironic, as the vast majority of Figma users are very much against Putin's regime. To be fair, Sketch owners too had pathetically followed Figma and announced that they stop selling licenses to Russian users, but at least the old licenses still work, and if they would stop for some reason, the last resort would still be available: cracked versions on torrent sites. You don't get such guarantees with SaaS apps, you are always dependent on their whims.

Also, this is the least relevant to your question, but having followed the two products for a while I'm pretty much convinced that it is mostly Sketch that does interface innovations that are quickly copied by Figma, and not the reverse. So I prefer to support the people who do the innovations.

Invision doesn't really have the editing tools that Figma and Sketch do, right? Like you can't easily wireframe or make components there or import readymade component libraries from the web, right? (like these: https://mui.com/store/#design)

The live multiplayer is cool, but admittedly just having an easily shareable link (google docs) style that any manager/dev/client can view and comment on was nice. No desktop app needed, no transferring files back and forth, just an evergreen link to the design. How does Sketch handle that sort of iteration?