Spring RTS Engine

Should it have info on them?

Course you'll try to shoehorn in lups and ignore cob, so I can't say entirely out with the old. Cob shouldn't be considered part of that though, as there is a pretty huge distinction between it and the other old stuff.

I think anyone using .cob or .3do models or .fbi unitfiles likely
a) has no idea what he is doing and just uses files he got somewhere.
or
b) knows very good what he is doing.
Neither needs any more info on it?
I would not delete what exists but don't see the use of adding more (or who would write it, what is key question anyway)

I tend to agree with both of you. I'd keep what exists on cob. Most of the stuff covering other old formats though is out of date anyway. I'd probably ditch anything to do with making 3dos.

It will slowly rot away if it is that unused, but actively deleting it would be criminal.

Don't update, but don't erase, IMO. The old information may be useful if, say, Final Frontier's original devs came back and wanted to update the game. (look now, a man can dream, can't he?)