Here's something I've wondered: where would modern-day Earth fit on the Inner Sphere's alphabetical development table? I'm guessing it would be pretty high up, since the state of Florida appears to have more colleges and universities than the whole of the Federated Suns.
Technological Sophistication: C or D. Medical is D, microelectronics are C to D, and education leans toward B but doesn't overcome the primitive technologies. The literacy rate is probably better, though.
Industrial Sophistication: An unambiguous C, sliding toward the low end of that scale.
Raw Material Dependence: A with no exports for obvious reasons.
Industrial Output: A or B; my money's on A but again, no exports.
Agricultural Dependence: A or B, leaning toward B but it's difficult to judge since the criteria is exportable surplus.
A thing to remember about those many Spitfires is how long did they serve? BT has mechs that are hundreds of years old. Best case would probably be something like the B52 or the Israelis continuously upgrading things like Shermans and Centurions long after their build dates, or small nations still upgrading M24 or M41 tanks in the 1990s. Fifty to sixty years is a fantastic service life already, to say nothing of the centuries expected out of BattleMechs, which never went out of production, which was continually upgraded with every new bell and whistle...
A detailed treatment of the various
Archer variants (probably at the level you'd see in
Jane's, not a TRO) is said in TRO3025 to take up a book on its own. That's
before most of the variants we know about, too. The Fan Article actually bounced off the character limit.