Caste is very much alive in India and this sort of blanket denialism reeks of upper caste privilege.
If caste is all that irrelevant, please go ahead with changing your surname to an obviously lower caste one. We will see how quickly you come crawling back to your so called “irrelevant” caste privilege.
Honestly the caste never comes up. In almost any conversation. And I also grew up far away from megacities.
I only heard a couple of priests blabber about the glory of their caste, but they were piss poor and had nothing else to be proud of. And they were bad as priests as well. That is, you wouldn't call them if you care about pure Sanskrit pronunciation, carefulness and seriousness during rituals, etc.
The people who suffered are dead. The people who committed discrimination are dead. Yet the whole nation has to accomodate. Reservation must be done on Pro-Rata basis. If one state like Kerela is advanced, doesn't do caste discrimination and another like Bihar is very much into it. Then only Bihar state should reservation, not whole of India.