No its really not, let's say you wanted to park a domain, that feature was first introduce to server 4. Let's say you had server 3, and you as tried to park but you couldnt cause he didn't update it. That would throw off alot of owners and they would all want to update. But smf for free is smart so he adds it to all the servers so you get the same features. I mean I wouldnt want to throw away a succesful fourm on server 2 for some features on server 4 so its better that he updates.