I've switched from Sublime Text 3 (native) to VSCode (Electron) and I couldn't be happier. If I didn't know it's electron based I wouldn't have been able to tell as a user. YMMV so don't generalise.
What machine are you using ? I have a 2 year old thinkpad, it's still 10h+ in full brightness, vscode, compiling, etc. And it's the screen brightness that consumes the most battery.
It used to do 20h, but the main battery is external and can be replaced so it's a good thing. I would really recommand thinkpads to everyone instead of going for macbooks for example.
I'm not even sure whether you're trolling. BBEdit provides a tiny subset of the features VSCode offers. VSCode is not a text editor, it's halfway between a text editor and a traditional IDE.
The difference to now is night and day.
Since both are written with electron the difference must obviously be the actual implementation, not the platform itself.
Keep in mind VSCode was written by Microsoft who have decades of experience writing IDEs and text editors, whereas Atom was written by GitHub who are mostly working on the GitHub product.
Could have fooled me.
I just switched to VSCode last month and it's been as nice to use as ST3 (actually even nicer because ST3 didn't have any code intelligence).
I've also used IntelliJ (or rather WebStorm) several times over the years and it always felt too sluggish and obnoxious.
For the record: I'm on Linux and have 32 gigs of RAM. So maybe I have lower standards for memory use and performance.