1) Nobody takes the Microsoft Store seriously 2) People barely take Bing seriously 3) Nobody cares about LinkedIn as a channel for free expression, nor is it a breeding ground for dangerous ideologies 4) Microsoft is generally much more enterprise-focused than these other companies, which all have very active footholds in the lives of regular people. When it comes to something like the power to make or break democrac…
Antitrust law isn't a tool to secure democracy but to secure competition. I don't think the worry is about actions taken by Microsoft hurting democracy; the concern is MS systems being insecure owing to a lack of competitive pressure and, as a consequence, being vulnerable to democracy-disrupting attacks.
You can run a few Linux distros as a reasonable desktop OS, with corporate support and all, if you want.
You can run Apple machines and software for desktop computing, as many companies do.
On servers, Windows is a minority.
MS Office is, of course, a one of a kind thing. Still it's interoperable with other software, within reason, and just reaps the benefits of the network effect, much as other specialized "industry standard" software.
As a monopoly, MS's position is weak now.