The only thing that matters here is that they aren't actually owned by MS yet. They have just agreed to be bought soon. So, there's still a substantial time for

The only thing that matters here is that they aren't actually owned by MS yet. They have just agreed to be bought soon. So, there's still a substantial time for customers to leave or adapt or whatever before the acquisition is completed. It's true that it would be worse if one day you suddenly were already a customer of a different company without warning. That's not the case here though. Side-note: I'm very critical of MS as a acompany and have been critical of GitHub separately, nothing above should be seen as defending them other than on acknowledging the fact that they've announced the acquisition long before it actaully will be completed.