Correction:

There is an ocean of software alternatives, however there are few alternatives that offer a direct alternative to Microsoft when it comes to being able to put the blame on them.

With most open source systems, the buck stops with you.

Now, I know there are companies that offers to take that buck and accept the risk, though they are not plenty when it comes as a realistic competitor to Microsoft.

Then you need to consider what alternatives exist to all third party software you need to run a company, the vast majority only run on Windows.

I work in the IT department of a company in the finance sector, show me an open source alternative to the Bloomberg client that runs on Linux and is approved by Bloomberg with an add-in that is as integrated into Libre Office as the official client is with Excel.

I guarantee that it is the same in basically every company/sector, they all have workflows that are simply not possible without Windows/Office or Microsoft as a whole.

Ok, so you start a new company, with all computers running open source software, Windows/MacOS is banned, that will only last until you notice that you can earn more money, while wasting time and money, while hiring new staff easier by running Windows/Mac.

Would you rather shutdown you company than accept reality and use Microsoft software.

I want open source to win, but ignoring reality is dumb