Comment by paulgb

Re. Figma's tech moat, Figma has a solid engineering blog that will probably interest folks here because they've had to invent new approaches. Here's some of my favorites:

https://www.figma.com/blog/rust-in-production-at-figma/

https://www.figma.com/blog/multiplayer-editing-in-figma/

https://www.figma.com/blog/realtime-editing-of-ordered-seque...

https://www.figma.com/blog/webassembly-cut-figmas-load-time-...