Emma Alvarado sued M$ in 2009 over the silly and costly XP “downgrades” for people buying PCs that came with Vista. The court disallowed class action and eventually ruled that M$ had not been shown to profit from the practice. Perhaps the dog ate the money but M$ and its partners never do anything without raking in huge amounts of cash.
She is tenacious and is suing again on more limited grounds, California law, which may better protect the consumer.
Going into business in any field is risky and opens one to legal suits but releasing beta software and charging money for it when customers really preferred previous products is a recipe for disaster.
I would have preferred Emma to organize a bunch of InstallFests, but each to his own… An InstallFest has the immediate reward of freeing people from enslavement to the monopoly and it is a lot of fun after the hard work of preparation is done. Legal suits tend to be draining of time and money for an uncertain result. In this case, I have no doubt that M$ is guilty of something be it poor business or gouging or anti-competition but justice delayed is justice denied and hardly worth the bother. Getting the world to use Free Software is a much more satisfactory result.