Did anyone see if they said whether these machines are user-upgradable? I have two late-2012 models that I've been very happpy with (one at home, one at work).

Did anyone see if they said whether these machines are user-upgradable? I have two late-2012 models that I've been very happpy with (one at home, one at work). Compared to the 2014 "update" the best part is being able to put in memory & drives yourself. (Couldn't watch the keynote and haven't seen this said explicitly anywhere...)