Sure, but if I have a Macbook with Safari and a Linux workstation with Firefox and a Windows gaming PC with Chrome, then I have to use a 3rd party service, righ

Sure, but if I have a Macbook with Safari and a Linux workstation with Firefox and a Windows gaming PC with Chrome, then I have to use a 3rd party service, right? I don't mind that personally, I'm just an old man yelling "You should have better interoperability between similar competing software services!" at clouds (in the literal and figurative sense).