My parents have a MSW inverter in their Monaco Diplomat motorhome (a very nice Magnum model), and they have burnt out more coffee makers than I can count on both hands! Let alone other equipment that has friend from it.
You see, this is what I'm trying to dispel.
What if it was built on a Monday and something wasn't right?
What if it had a defective leaky transistor that kept blowing your coffee maker but could have been fixed?
You've blamed the MSW technology for what could very easily have been a one-off problem with that particular unit and no others of that model or MSW technology in general.
That is nothing short of really poor analytical thinking.
If MSW tech really was to blame for burning out the coffee makers wouldn't you expect all MSW inverters to do that in all motorhomes?
If Magnum built a model with poor design and their design was to blame wouldn't all of these same models be burning out coffee makers all over America?
Doesn't the fact that this isn't happening everywhere to everyone kind of hint that maybe your parents just got a lemon?
I just believe you should think a little harder before you take an isolated problem from one inverter and decide that the problem was an entire generation of technology.
I would bet replacing that inverter with a different MSW inverter would also solve the coffee pot problem. The problem will likely be solved with the Victron, not because you upgraded to PSW but because you removed the lemon inverter from the equation. Of course you're free to believe that PSW was the solution if you want.