The brilliance of the system he built was that it allowed for real time collaboration. Which was god send from the Sketch -> Zeplin -> Invision -> Avocode (version management) ‘stack’ that lost Enterprise design orgs were using.
Which was already a large leap from what Adobe was expecting us to do with Photoshop/Illustrator (after they depreciated Fireworks).
Figma made handoff much easier. Made version control dead simple. Made my life as a UX leader much much better. I remembered talking to a few now-Gigantic companies back then and we all plotted the move together
It wasn’t lost on us that Sketch is/was much much smoother with its usage of Mac OS’s native shape rendering. It’s just that the benefits far outweighed the small drop in snappiness.
And for anyone who’s going to say “Sketch was Mac only that’s why it failed!” I assure you that had nothing to do with it. For the same reasons an entire generation of UX/UI designers stopped using Axure. But we would need to start talking about Invision 7 and Invision Studio if you wanted to get into the nitty gritty.