It is worth mentioning that coffee is much more popular than tea in Bangalore (and other cities of southern Karnataka) in most middle class joints. However on the streets, tea still rules. Probably because cheaply made tea is more palatable than cheaply made coffee.

South India is coffee country (although you still get both). I'm a Tea fan (addict?) but filter coffee is also something I really like (https://en.wikipedia.org/wiki/Indian_filter_coffee).

Interesting! So down south it'd more commonly be just milky, black tea with sugar?

No, you can get tea flavored with spices (added while making the tea, not during production of the tea leaf), in the south too. Ginger and cardamom are more common though, IME. See my other reply.