Purpose of the MBT?

[TAH]

Light, Medium and Heavy, all exist today, and never went away.

Based on what parameter of factor?

How much they weigh?

Caliber of their Armament?

Their Mission?

There are "light" MBTs armed with 105mm+ cannons out their, but they are not normally used in the "Light tank role" scouting, recon, screening ect.

The modern analog to the PZII is a cannon armed IFV or scout/recon vehicle.

There are a lot of very "heavy" MBTs out there M1A1, M1A2, Leo2A4/A5/A6, Challenger 2 are all examples. But the concept of a heavy/breakthrough/infantry support tank (lots of armor and slow) is gone.

So are the last generation MBTs, (M60s, Leo1s, AMX30s) your mediums?