To me it looks like big corps enjoying the idea of having free service so they can avoid maintaining their own stuff, and trying the "too big to fail" fiddle on open source maintainers, with little effect.
It's not like older versions of git won't work perfectly fine. Git has great backwards compatibility. And if there is a break, seems like a good opportunity for them to fork and fix the break.
And lets be perfectly clear. These are very often systems built on top of a mountain of open source software. These companies will even have custom patched tools like gcc that they aren't willing to upstream because some manager decided they couldn't just give away the code they paid an engineer to write. I may feel bad for the situation it puts the engineers in, I feel absolutely no remorse for the companies because their greed put them in these situations in the first place.
Oh no, if only these massive companies that print money could do something as unthinkable as pay for a support contract!
I don’t maintain any tools as popular as git or you’d know me by name, but darned if I’m going to put in more than about 2 minutes per year supporting non-Unix.
(This said as someone who was once paid to improve Ansible’s AIX support for an employer. Life’s too short to do that nonsense for free.)