Earlier quoted context omitted.
I don't disagree with you. Skype is ugly, bloated and has been crashing frequently since the last couple of updates on my computers. The problem is: it works. I tried to do a Google Hangout last night, and the plugin couldn't find my mic. Logged into Skype, it worked perfectly. It'll be a while yet before someone really takes Skype's business. For now it's my #1 goto communication line as a remote freelancer.
This was the point I was going to make too. Skype is terrible, but yet it is still the best compared the competition. Let's consider the competition: - Live Messenger: It was the next best, now discontinued, but before that it was poorly supported, rarely updated, and had a ton of bugs. No external connectors (e.g. telephone networks). - Google Hangouts: Browser only. No external connectors. - Facetime: Apple ecosyst…
edit: Oh, missed your external phones requirement. You'd need SIP for that with Jitsi.