Depends which IDE. IntelliJ stays open permanently. When I used full-fat visual studio it would crash so often that I’d have developed an even worse caffeine problem had I fetched coffee every time it needed restarting.
Is this the reason why people say that 8gb is not enough for writing some code?
Nah, Electron is the reason, my first real IDEs were the whole suite of Borland IDEs for MS-DOS and Windows 3.x.