Where Are The Flying Cars?

I've often wondered why the tube is SO much busier than the subway, and it's partly because the tunnels and therefore the trains are much smaller.

Trains can run as frequently as you like but if you can only fit 12 people in them it doesn't matter.

There's no room to stand! Positively claustrophobic at times. Also, it's too expensive! For the amount you have to pay in London you should be to your destination in 5 minutes, get a free cup of tea and a similarly quintessentially English cake of some description. Instead it takes a week, via 3 other places after standing on a platform watching numerous full to capacity trains roll by and you're lucky if you avoid the nightmarish prospect of a replacement bus service.

Trouble is, it's a rather difficult thing to improve. How do you enlarge tunnels and trains without catastrophically stopping services? You can't. Any attempt to elongate trains and platforms would suffer the same. So we're screwed. Unless flying cars finally become commonplace. I was told there would be flying cars by now. And domes over cities. Also aliens. I've wandered from topic. Even if flying cars were available, I'm sure they'd merely hasten the end of the world with inevitable pollutants.

Wow, this was supposed to be an amusing post. I'm gonna go before I depress everyone.