[AlexandrB]

It's a problem but not insurmountable. Otherwise we'd all still be using ICQ/AIM/MSN Messenger/Skype/etc.

[blitzar]

We are off those because of multi messanger platforms made switching to the "hot new thing" very low friction. It was only once mobile came along that the playing field narrowed so much.

Current networks have way more lock in than back in the day.