I have no interest in convincing him, I oppose his views and dislike a lot his long lasting habit on jumping on any discussion about open source only to tell the same old about how all open source developers must be out of their mind, and how much more perfect "his way" is, when clearly, the opposite is the truth. Remove all open source components from all amiga today and what would you have left? No MorphOS, no AROS, huge parts of OS4 lacking, no browser worth speaking of, no python, no gcc, no libpng, no libjpeg etc. To say "open source is bad" is just stupid.
Thanks to GPSoft releasing the sources to DOpus4 and 5, we now can enjoy those programs with support for large filesystems and on multiple operating systems. Yes, it is really terrible how that happened.