The gap between those two technologies is larger than you suggest.

Horse carraiges: 1400 Automobiles: 1890

Horses and cars were in use at the same time, just like HTTP and HTTPS; I'm not sure why their invention times are relevant?

Gunpowder and ICBMs were also in use at the same time

I'm claiming the technological backstepping is not nearly as drastic as the GP implies.

But you listed a completely irrelevant gap. The gap of relevance is the one between automobiles and now, not the one between carriages and automobiles. If automobiles were the transport technology of 1890 and carriages were the technology of 1889, then devolving to carriages puts us back to 1889, regardless of when horses were invented.

Pretty sure horse carriages were around a lot earlier than 1400, unless you were thinking BC.

Even better. I was giving the benefit of the doubt.

That's around the time carraiges got suspension and were pretty much like the modern form.