When I've worked on multi-platform apps, the case for "write once, run anywhere" has always boiled down to developer hours and current knowledge. Sometimes someone suggests that a single GUI will mean less code and fewer bugs, but the ones with cross-platform GUI experience know that's optimistic.

"10x as much work" is a huge overstatement, especially when platform conformance is a goal.

For native look and feel, I'd pick Qt over Electron any day. The catch is that no toolkit can abstract away all the platform-specific details. A minimum-effort Electron app looks like a web page; a minimum-effort Qt app falls into the uncanny valley.

There can be good reasons to choose Electron! But it also has drawbacks, and it isn't the only option.