Earlier quoted context omitted.
The UX is actually kind of bad. I think it is electron-based, the menus are far from a work of art, and the folder management seems very primitive. But that said, it is by far the best product despite this.
What do you mean Electron based? There's no such thing as an "Electron-based UX". Bitwarden clients have the same UX across OSes and platforms ( browser extension, mobile app, thick client". The thick clients are indeed Electron based.
I'm actually a bit confused by 'the same UX across OSes'. What does this mean? The mobile UI is completely different to the desktop apps and web app.