I've used Sketch since its early days and then after (who knows how many) years, reluctantly and angrily moved from Sketch to Figma. Sketch was the pioneer and Figma took a very long time to catch up with what I've considered important features, and of course Figma had the advantage of being cross-platform but that was a non-issue for me as Sketch introduced web-based previews for clients.

The reason why I ditched Sketch (even though I loved it) was because Sketch had quality control issues over time and they started messing with my work, even losing some of it (cloud saves). The frustration grew over a longer period of time until I lost all hope and just had to admit that it was a lost cause. I peeked at Sketch's changelogs for a year and saw only bugfixes and no features. I assumed it was dead; either way the chapter was closed, the entire company shifted to Figma.

P.S. which is not to say that Figma is in a good state now, or that I don't feel history repeating itself.