It never states that they had these in their birth years. Just that they had them. Might have been in the 2020s with the Koenigsegg Jesko Absolut, which is the fastest car and was built in their lifetime. And coincidentally, currently the fastest in my lifetime as well
Cars are also waaaaay faster today than they ever were in boomer days. You could smoke all their 1960s and 1970s muscle cars in a fucking Prius lol, never mind something that's actually engineered to go fast.
I have lots of issues with modern cars. Horsepower is not one of them. Idk if you can right now, but pretty recently you could spec a 300hp minivan from most major automakers.
That's a lot of 50s nostalgia for a decade you spend mostly shitting yourself and barely able to put together a sentence. Reminds me of my grandparents talking about living through the blitz being born in 1945.