I second that. I have been in the industry for two decades (three continents with most time spent in India) and never in my career I encountered communication around someone’s caste at workplace. Every time I come across such topics, I casually discuss this up with my colleague friends and there is hardly anyone who seems to cares.

On the other hand, what i find more visible is regionalism. It is common to stereotype say a Punjabi, a Bihari or Tamil or a Marathi. Both in front of behind each others’ back.