I don’t know if this applies to all apps, maybe it does. But I think if you are curious, it is a quick way to see if the app you are using is Electron based or not (not that I have anything against them).
The app that doesn’t show the white lag is Bear.
Electron:
Native:
Or you can just run this command in termal like a power user. 
find /Applications -type f -name “Electron Framework”
Thanks, this is the one I’ll show to my friends!
But neither Teams nor 1Password do that, everything is dark.
Yes, that’s also what I found. I don’t know how do it!
I like @NiKoBeaR’s method – just be sure to use STRAIGHT quotes not smart quotes in the command.
find /Applications -type f -name "Electron Framework"
I think, this has nothing to do with Electron, or not, but with a lack of available RAM or GPU.
Thanks for this! Found and deleted an app I don’t use anymore.
It surprised me that RStudio is on Electron. It feels more native than any other IDE.
Could it be because of how those apps are optimizing resources? Like how video games run at 60 fps on consoles yet when they port them to pc they get all kind of issues because of bad optimization?