I had to wait two years for them to update Tau Codex, and let me tell you those rules didn't come free in the core set.
Also remember that FFG isn't just the company that makes X-Wing the way GW is just the company that makes Warhammer; they have entire games that they're churning out rules, fixes, miniatures for.
Once I've waited for FFG to update the rules for two years and the updated rules are worse: then, I'll worry: about the same amount I worry about 40K Apocalypse stuff dying off. That is to say, not very much at all.