How big does Delhi feel compared to dense parts of New York City or Tokyo? Is it more or less crowded?

So there's ~30 million people that live here give or take. The 3 major metro areas in India are Delhi, Mumbai, and Kolkata. I am just naturally curious as to what it's like to walk around. I know it's hot and polluted AF. But what I wonder is how crowded is the metro system and the suburban railways? Is it manageable? Or do you feel like a sardine everywhere you go? And as far as sprawl goes, is it like NYC and Tokyo where you feel like it would take hours to get in and out of? What's the traffic situation like? Do you have any good alternatives to driving? What are the touristy areas and what are they like? For those of you who've been there or lived there, what's your take on what it's like to be in Delhi?

So there's ~30 million people that live here give or take. The 3 major metro areas in India are Delhi, Mumbai, and Kolkata. I am just naturally curious as to what it's like to walk around. I know it's hot and polluted AF. But what I wonder is how crowded is the metro system and the suburban railways? Is it manageable? Or do you feel like a sardine everywhere you go? And as far as sprawl goes, is it like NYC and Tokyo where you feel like it would take hours to get in and out of? What's the traffic situation like? Do you have any good alternatives to driving? What are the touristy areas and what are they like? For those of you who've been there or lived there, what's your take on what it's like to be in Delhi?