Are those checks and balances specific to 200 ships, or could the limit for Inferno builds be expanded? And why hasn't this been done for regular builds as well (you don't have to post a detailed answer as it will probably just lead to more questions)?
Inferno has 400 ships, not 200. And no, it can't be bumped without causing the same problems that led to the Inferno build in the first place.
Bumping is not a trivial matter, in this case, because it breaks EVERYTHING. (Well, not everything, but most things.) It's nowhere near as simple as, say, bumping SEXP_NODES (which have been made dynamic anyway). The two major problems are the pilot files are rendered incompatible and multiplayer doesn't work. However there are a bunch of other seemingly unrelated issues that follow from these.
As for why haven't these problems been fixed yet -- the answer is that we've been trying to. Taylor, bless him, has been working on the 3.7 code for probably over two years now. When 3.7 is ready, ship limits will be obsolete. Until then, you'll have to live with what you've got.
Here's a good counter question noe one has asked.
For everyone who says "Just use an Inferno build"... WHAT do you lose by doing so (if anything) by not using 3.6.9 or 3.6.10??
Is the max ship number the only difference between builds?
I'd like to have that answered by a SCP person...
Well, you can't interchange Inferno pilots and regular pilots, for one thing. Inferno not only bumps ship limits, it bumps weapon limits too, and a few others, I think.
We really need an SCP FAQ somewhere. This question has been asked before, but every six months a new group of people comes along who haven't heard the old answer.

EDIT: I know. Somebody should do a search for the common SCP questions and post them up on the Wiki.
