VSCode isn't that snappy either but it's decent enough. If every Electron app was like that "It's slow because it's Electron" wouldn't be such a meme.
VSCode really needs better competition than clunky Java IDEs from the likes of JetBrains or Eclipse or platform-specific native IDEs like Xcode.
But yeah there's clearly room for a snappier LSP-based editor, preferably one with a toolbar.
It has integrated docs, simulators, unit/UI test functionality inc coverage reports, live UI debugging, tons of profiling tools, and I can use it to upload my apps straight to App Store Connect. Starting with XCode 13 I also have built in CI/CD. I can build, profile, test and deploy a whole app on multiple platforms from scratch with it. And its free.
Certainly reflects my experience as well. When the text editor of a development environment doesn't work right, I mean, shouldn't that be job number 1? Search google for "Xcode bugs", you'll see thread after thread of complaints.
I can find major complaints of bugs and crashes going all the way from 9 years ago to the latest Xcode release, no other development environment has this many complaints. It is by far the most buggy and crash prone development environment available today. People _happily_ pay for AppCode for a reason.
Ideally it would be here OR there, ie much less of them!