[ Thanks to An Anonymous Reader for
this link. ]
“Let’s break it down. There are four combinations of
apps and OSes:1. all proprietary applications on a proprietary OS (PoP)
2. (at least some) free applications on a proprietary OS (FoP)
3. (at least some) proprietary applications on a free OS (PoF)
4. all free applications on a free OS (FoF)“I think the order here is important as it indicates the typical
migration process from all proprietary to all free. A person
typically starts using Windows with all proprietary apps. They
learn of some great free alternatives and start using them. They
then try out GNU/Linux but still want a few proprietary apps or
codecs. And, sometimes, they eventually move to an all free
system.”