I agree for the most part. I have won more converts through leading by example, than by trying to force the issue. Also having a stock of Raspberry PI loners helps.

I would argue that there are times when discussing free as in freedom can be used to good effect. I have used the argument when someone couldn't open a document on their word processor because the proprietary format had been updated.

I have found the frugal argument to be more of a hindrance than a help. Namely the "you get what you pay for" or "pay peanuts, get monkeys" spring to mind. So rather than saying it's free, you can explain that large companies pay for support. Or, that you will be expected to contribute back in some way once you are up to speed. It usually say that in a Vito Corleone/Marlon Brando accent.

Ken.