Sam has to answer this question.
Why? What's your problem?!?
I'm actually getting pretty riled about this.
Models are based on the base they are supplied with.
That is the ffing rule, it's right there on pg. 3 of the main rule book. I am under no obligation, in any way, to rebase old models.
I mean, really, this is firmly, completely settled as a rule. It's in the main rule book, and it's always been that way, every edition I've played, it's not the first time it's come up. Yes, those old terminators on little bases are legal too, if you want an extreme case, but I'm not sure why that's any more noteworthy that the old avatars, which you still see all the time.
It's all the the more aggravating because this is completely inconsequential on the models we're talking about. The only thing that smaller broadside bases do is make it slightly easier for the enemy to actually catch two under a plasma cannon blast. No, it doesn't affect assault ranges at all, the front edge of the thing is going to be where it's going to be.
I have no idea what you are all so excited about, but that's not what the rules say, it's not how it's always been played, and it doesn't matter anyway.
I'm not even sure I want to take Broadsides, I don't much like their new rules, but I'm not going to go rebasing models that I actually spent time giving scenic bases, when I have a lot half-painted or only primed models that need attention. And the rules say I don't have to.