I used three prams for each of my two children, a hard bodied fully sprung bouncy big pram for local walks to shops, park etc, a Mama's and Papa's pushchair and then a MacLaren buggy both of which folded down but the MacLaren was what they called an umbrella design, folded with one hand. It went on buses, trains, in the car, everywhere and took up next to no space while baby/child sat on my knee, no problem.
My ED however, had a giant Silver Cross combo, took up loads of room and never got put down on buses. I did advise her to get a buggy as DGS got older but to no avail. She did tell me it was faulty with second pregnancy to get a new pram out of me until I got in touch with a shop which could fix it for a snippet of the price and then suddenly it was ok again. So used again for second son.
I am now a disabled motility scooter rider, ride my scooter locally and would be able to go round town in it too but I don't want to be left at a bus stop in favour of prams. I have problems in the water works department so it is important to get home at times, as soon as I can, and the dread of not getting on a bus when I need the toilet is not a thought I want to have really. I have enough problems. So I tend not to venture into town now as I can't get round due to my breathlessness and I can't take my scooter neither. Plus, as I have never tried, I am a bit embarrassed by using it other than locally to be honest.