If you want to convince someone that the open source frameworks and programming languages are the best ,what would you tell him?

Question

Open and close source comparison

Answer 1

They are for free, you can modify them if you need to, most of them has a good community, so you can get an answer to most of the questions, in most cases they widely used so a lot of problems are solved or have a workaround. I've been in situations where support team of the proprietary tool were unable to solve a problem with their own tools...