1. Users are more comfortable running Windows and Office because it's Windows they likely used in school and on personal laptops.
2. This is the biggie: Microsoft's enterprise services for managing fleets of workstations are actually really good -- or at least a massive step up from the competition. Linux (and it's ilk) is much better for managing fleets of servers, but workstations require a whole different type of tooling. And once you have AD and it's ilk running and thus Windows administrators hired, it's often easier to run other services from Windows too, rather than having to spin up another cluster of management services.
Software focused businesses generally start out with engineers running macOS or Linux, so they wouldn't have Windows management services pre-provisioned. And that's why you generally see them utilising stuff like Okta or Google Workspace
Unfortunately Google did not succeed to get more into schools around the globe with chromebooks, which is a pity by my opinion. That helps to keep the Win/Office monopoly situation to go on in organizations and businesses hiring people who never used another software than one from Microsoft.
One reason being that Microsoft lobby hard against low-end PC & notebooks that are not aligned with its interests. [1]
Microsoft has a large, entrenched distribution network and market all over the world. It makes an uphill battle to create low-end programs for schools, universities, governments, SMBs.
Hence the phrase "no one was ever fired from buying Microsoft". It's too hard a battle to go against the flow.
1. Users are more comfortable running Windows and Office because it's Windows they likely used in school and on personal laptops.
2. This is the biggie: Microsoft's enterprise services for managing fleets of workstations are actually really good -- or at least a massive step up from the competition. Linux (and it's ilk) is much better for managing fleets of servers, but workstations require a whole different type of tooling. And once you have AD and it's ilk running and thus Windows administrators hired, it's often easier to run other services from Windows too, rather than having to spin up another cluster of management services.
Software focused businesses generally start out with engineers running macOS or Linux, so they wouldn't have Windows management services pre-provisioned. And that's why you generally see them utilising stuff like Okta or Google Workspace