On Mac, I use Firefox and Chrome.
However, if I use a Tauri app on Mac, I have to use dated WebKit. It's out of a Tauri developer's control.
Sure, but many people use Safari, which runs that exact same WebKit engine under the hood. So if your app is available in the browser in addition to Tauri, you have to support it anyway. And at the very least, you as a web developer should be used to supporting it.
Of course using unsupported OSes isn't the best idea, but Apple give you security updates longer than they give you 'fun' safari updates.