It's mostly hearsay. Electron is highly optimized (it's chromium after all). Making an electron app doesn't make it automatically slow and clunky. That's absurd. Sure it is a browser and it takes a little more Ram than you are used to (but most machines nowadays have 8 to 16 gigs of RAM so not a huge issue).

What does make an electron app slow is the app itself. Obviously. You have VSCode that is blazing fast even for humongous files and you also have some other not so fast apps.

Another huge issue raised is size. To be honest, 100 MB isn't abnormal for a desktop app. Look at any Qt app, it can be around 100 MB too. Same for dotnet.

Of course native is better but most developers don't have the resources for that.

Edit: I see people down voting without giving any reason. I know this is an unpopular opinion but come on. The days when you could use VSCode as an example of slow, clunky Electron app are gone. What's slow and huge is Jetbrains IntelliJ or Visual Studio; both native. VSCode proved that you can make a fast electron app; it just needs work like any other thing.