It's not "horseshit" - I gave you a caveat precisely so that you can understand the limitations of my comparison, and so that you don't need to be so antagonistic.
lightweight
I launched VSCode fresh this morning. Just now, 4 hours later, I closed it and watched my system memory usage: 1.3GB. I am doing remote development, so there's a whole server process as well which is chomping a few GB. My old laptop repeatedly ground to a halt until the OOM killer woke up/I rebooted as its measly 32GB of RAM couldn't cope with two VSCode sessions (plus other normal apps) after a while.
Electron is the abomination, not VSCode, and JetBrains IDEs are developed by... JetBrains, not Oracle.