I understand completely. It’s what people are used to and tech illiterate people don’t want to learn “we actually use a different software here”. These are people who already struggle with excel.
Personally if I were to start a business I’d use open source where practical, but I’d be struggling there because it’d be an engineering company and neither autocad nor solidworks is available on linux. It would be a decision on par with and probably in conflict with my commitment to running any such company as a co-op.
And this is kinda where we run into the problem, Microsoft won. The anti trust it needed to lose was it being able to demand to be the only option as a pre installed OS decades ago.