more the other way (away from Apple's paid upgrades).
Not sure what you are talking about there. Apple OS has been free for a long, long time and still is.
The last OS I paid for was 10.6 (a whole $39)
10.7, 8,9 and now 10 were all free, as has been the iOS upgrades.
An unlimited user server licence is $20.
BTW, they are all full versions too.