Well the way I was thinking is that if the game was packed as a legit pkg file that is signed with the public key (or whatever it's called), then it wouldn't matter how many times the OFW got updated, as the game would remain playable just like any other game installed on the PS3. Unless of course Sony managed to make the public key useless, although it's hard to see how since so many older games are signed with it.
And yeah, in fact that was my main reason for having two PS3's in the first place. I had both long before PSJB came out, and I lucked out because since I had one sitting around as a backup, I never updated and was able to JB it. Boy am I glad I didn't keep it up to date like my main PS3! And ironically after going through 2 previous PS3's (why I decided to get a backup) I have yet to have a problem with my main PS3, which so far has outlasted both my previous ones. Go figure huh? lol.