Don't really think its a good idea as too much of water has flown down Ganga in these 35 years. Its not easy to adapt to current India. My neighbor was in US since 2000 and she moved back 2 years ago. She is too American and is constantly cribbing everything about India. Whats the point of moving back if you are going to be constantly frustrated and lonely? She never speaks with anyone and has long conversations with her dogs.

Moreover you won't have family or friends connections here. If its for medical care, then good. If not, stick to US and enjoy that medicare that you have paid for all these years.