FOSS existed and worked fine before Github and even before Git itself. It's certainly a convenient tool, but not irreplaceable. Git is also well suited to being used in a decentralized way (with no centrally hosted master) compared to older VCSs like SVN. Again, less convenient but not the end of the world.

Git is not well suited since it lacks one of the most important part of collaboration - communication

Git was designed to be used with email, which adequately solved for communication and decentralization (at the time at least).

And even if it doesn't wouldn't to Dedicated communication tool solve communication better than a dedicated revision control system?

What happened to using multiple applications each best suited for their domain?

Life happend and led to the concentrated "best suited github.com app for the domain" which spawns sister articles to the one posted here

it was just as inadequate at the time as it is now

I wouldn't count things they've acquired; those products/services were already running, and all they need to do it not add too much crap and/or keep the servers running.

> Microsoft is able to keep GitHub and npmjs.com online

Somehow they were also capable of killing Skype, Nokia, and Yammer, among some other things. They've also made LinkedIn less user-friendly and overwhelmed with ads.

GitHub (I feel) never had so much downtime before the acquisition. I'm dreading the day when they finally make something so stupid that would drive hundreds of thousands to move their repos someplace else.