I believe you’re right in that there are money to be made in developing desktop app, but I also believe that the customer base expect thing to be native, so don’t try to do Windows application using GTK or macOS applications using wxWidgets.
Which is why everyone and their dog is going Electron. Linux compatibility is one thing (which no one really cares about, except for software in the public services sector), but users generally expect that their software is available on a Mac - not to mention that people using a Mac tend to be on the better-earning/willing to pay actual money for software side.
Companies want their application on two platform, use Electron and now their product suck on both.
Electron is actually a reasonable solution for internal and bespoke software. It just not at a level where I can see it being something I’d want to pay for as a consumer. Again VS Code is pretty good, but it’s still clearly not a mac app.
And that happens occasionally with Discord, without running make -j42.
I think everyone is moving to electron because web developers are a dime a dozen.