ICE technical advances are in the same territory as advances in CRT, film based photography and coiled coil light bulbs. Nobody took LCD screens, digital cameras and LED lights seriously in the 1990's but here we are today where we only use the new stuff.
Flat panel yield was a problem in the 1990s, every screen had dead pixels. The magic of film grain and a Pentax SLR wasn't that special, kids today don't even know or care. The warm colours of old lightbulbs are forgotten too. Yet there was amazing analog engineering and precision mass manufacturing with these products.
ICE is going that way. The yield on the battery part is being solved, aka range/price. For performance the electric motor has no equal and things like regen are game changing. In time ICE will have specialist applications such as for creating electricity to charge a battery in remote locations, that will be about it. The tech innovation and investment has moved on to electric power trains. The horse has gone and it is too late to shut the gate. Nostalgia is not enough for ICE particularly when the baby boomers have moved on.