How is that a negative? Obviously if you dont own a Xbox or Windows 10 PC i can see the issues.
Well its just a rumour so dont take it as a guarantee just yet.
For one, it's taking a popular IP away from fans who supported it. How can that not be a negative? Second, I don't trust Microsoft whatsoever. Lionhead got axed after being forced to make a GaaS title when they had no experience in that field. Wouldn't surprise me at all to see Obsidian used poorly. Spencer hasn't exactly been setting the world on fire with his first-party decision making.
When a studio that's closely tied to a company gets absorbed, that's fine, but watching multiplatform studios get swallowed up does not sit well with me.
Also, I'm not buying anything from the Microsoft Store. Are all Microsoft games on Steam?