I get 40 out of my 18 Focus RS so long as I keep my foot off of the fuel pedal. I tend to drive on cruise as much as possible and interestingly, I get my best mileage in the summer with the climate control on... I get it up on the turbo and the mileage goes south real quick. The emissions hardware has never caused me any issue, ever. The auto makers have successfully integrated it into their gas motors I'd say, unlike Diesel tractors that are post 4 compliant.
Being an old fart I rarely get on it, but if I do it's quite capable of triple numbers on a freeway on ramp.
350 horses in a roller skate equals a supercar with a 6 speed close ratio manual trans. Gets rubber in the first 4 gears too, not that I do it often, I don't. The low aspect speed rated tires are super expensive but it's there, lurking under the hood.
Nice thing about it is, here in Michigan, it insures as a normal Ford Focus hatchback economy car so insurance is cheap, relatively speaking. Has nice Recaro bucket seats and comes with a 3 point harness as well.
My wife was not happy when I bought it off lease but she's calmed down over the years I've had it and I just do normal upkeep on it other than it's a GDI engine with no pilot jets in the intakes to keep the intake valves clean and carbon free, so I run Sea Foam top end engine cleaner through it every time I change to oil at 5K miles. I have over 80K trouble free miles on it now. Just changed the serpentine belts to Gates Fleetrunner belts. Quite a chore as you have to remove the right inner fender well to access the ac compressor belt. One of Ford's 'better ideas' and it's what they call a stretchy belt so no idler either and it requires a special tool to remove and replace it. What a chore....