The time where an application is perfectly tailored to the machine you're using and everything is near perfect happened, but I think that ship has sailed.
That was the brief moment when the iPhone was the only smartphone to target and was 320x640. Or when the majority computer screens where 1080p at most and the browser would be on more than half the screen estate.
But for your bank for instance, if their UI is optimized for a 6" diagonal window, they'd probably expect you to adjust for that instead of them trying to be perfect on every screen combination that could happen on earth.
That's also how I see many support chat apps' choices of spawning a popup when running on a desktop, to reset any browser size the user was trying to use in the first place (users are still free to do whatever they want with the popup, but it's a good indication of what size it's supposed to be)
That was the brief moment when the iPhone was the only smartphone to target and was 320x640. Or when the majority computer screens where 1080p at most and the browser would be on more than half the screen estate.
But for your bank for instance, if their UI is optimized for a 6" diagonal window, they'd probably expect you to adjust for that instead of them trying to be perfect on every screen combination that could happen on earth.
That's also how I see many support chat apps' choices of spawning a popup when running on a desktop, to reset any browser size the user was trying to use in the first place (users are still free to do whatever they want with the popup, but it's a good indication of what size it's supposed to be)