Agreed it’s an excellent editor however it has a lot of engineering resources behind it and still suffers from sluggish performance, especially on startup.
Both an Intel and an M1 mac, it's especially noticeable on the newer machine as native apps open instantly, even Xcode, which is a pig seems to open quicker. Like I said it's a great editor and I use it when I need to do some Python or JS work (remote/ssh development functionality is especially nice) but I don't think it's immune from the resource argument against electron.