[berkes]

A large part here is the "sales". Commercial software, almost by definition, has a sales team that ensures their software is bought by universities, companies, governments etc.

Non-commercial software does not have this in that sense. It may have advocates who, out of sheer enthousiasm, bring software into such universities, companies and governments, but hardly ever an actual sales.

And since non-commercial software is largely FLOSS, whereas commercial software if most often proprietary, we see that, simply through sales, the proprietary alternatives are used far more often.

Regardless of any technical merits. Technical superiority hardly "sells" software, sales teams do that. Unfortunately, I might add.