Is this forum capable of having a conversation without throwing shade at people? Accusing them of things? Snarky sub-posting? Seems not.
I think the forum is capable of doing this, but you make this hard on yourself imo. In this post alone you mentioned the 90s, but how does this matter for Xbox in 2021 with a complete different leadership and everything?
You also said their might be people not liking to work with MS or their tools, ... at Bethesda, which in itself is fine I guess. We all have our preferences and which IDE or frameworks for example we like to use... But do you even realize Bethesda started as a PC developer and their first console game was on Xbox? Do you realize the ID Software guy developed now for Windows and Xbox alongside PS for years? So he clearly doesn't hate working with or for Microsoft owned software or hardware. Otherwise he would've been long gone.
So out of all the reason someone could leave a company (family, work environment, money, ...), you really propose us the idea of people leaving, because the PS5 isn't getting ports? That's ridiculous and that's why some made fun of it.
We also know Microsoft sees Minecraft as their preferred way to integrate companies into theirs, keeping culture and everything intact. They learned their lessons in the past and are very aware of the culture of a studio. They won't touch it and in Zenimax case it probably even be a different publisher arm under Xbox. Thus nothing changes, except more money and access to more technology and ressources, while they keep what they keep doing. With the exception of a PS5 port, if that's what MS demands of Zenimax.