Yes and no. Everything is fine until you hit the 2gb limit. The average professional laptop has a 16gb ram. Figma is not only the vector app. If someone wants serious vector work, Illustrator and Affinity Designer provide a solution.
Figma is more than this, and the complexity of the workflows requires offline support and more memory available to the app.:)
Has performance in Sketch fallen in recent years? I know it's not as popular any more, but years ago when I used Sketch the performance was always top notch.
I used sketch around 2017-2018 and the performance was really bad. Much worse than Illustrator. At the time I was on a top of the line 5K iMac.
Currently on an M2 Pro MBP and Figma is more responsive than Affinity Design. The latest versions of Illustrator have had a bunch of GPU rendering issues that affect performance. In fact these issues were the reason I started using Figma.
It is time to remove electron based app and invest in something that will have a proper memory management. Not only 2gb. My phone has more than this.
You have cornered the market. Now deliver.