I thought that Thunderbird was a native application for quite a long time. For some reason it never had the same icky feeling I get from any Electron applicatio

I thought that Thunderbird was a native application for quite a long time. For some reason it never had the same icky feeling I get from any Electron application (even supposedly "high quality" ones) and worked fast on crappy machines (which is what I've typically used throughout the life). Of course, performance went a bit downhill since they abandoned XUL in favor of pure HTML, but still.