Its my mistake.No, sorry for being a dick earlier.
Ok, I wasn't aware of that.
Abrams weights around 67 tonnes & t90 around 48 tonnes, Arjun around 65 tonnes.
IA using 1500 ~ 2000 t90 compared to 124~ 250 arjun which include new orders.
Medium category means low cost high tech weapon; for ex. f35 compared to f22, and its weight play important role.
If you consider MBTs, weight is not a major issue for most of countries, but for some cases weight does matter & downgraded MBT can't meet all requirement, and weight limited MBT were required, and there is no light MBT. Now how to describe those tanks ? MBTs - like you said, but these causes lots of issues, to avoid I use medium MBT. IA use term overweight for 60 plus tonnes tanks. I don't thing IA consider overweight MBT in near future.