What Is GitLab & Why Do So Many People Flee To It After The Purchase Of GitHub By Microsoft?

It already a fact, according to Bloomberg, Microsoft would have bought GitHub for about 2 billion dollars. Now both companies have confirmed the transaction on their official Twitter accounts. People seem to be divided between those who see something positive in Microsoft honoring their mantra of love for developers and open source while there is more than one skeptic who believes that it is the end of GitHub as we know it. The latter seems to be migrating to a platform with a rather similar name: GitLab.