Are gas engines going to make a comeback?

If you can afford more than a second (new) car every couple of years, then you will most likely be able to afford to run them on low-volume fuel. But I would expect that the Chinese market will move first towards electric cars (I would guess they import a lot of fossil fuels from the developed world) and they will keep exporting them near cost to nearby economies. You can either chose to build better electric cars then them, and compete, or keep building combustion-driven cars at lower volumes to some select markets.

Currently the demand for roll-back is mostly because the car companies want to make some money without spending too much on development, after they established the belief that they cannot out-develop the Chinese by just selling electric cars – while previously they were the ones lobbying for the phase-out, expecting to be able to out-develop each other on the road to BEVs.

I guess one of the main killers of BEV was the failed push to L5 autonomy, which would have enabled seamless car-sharing, and instead of recharging on a long drive, you would just swap your luggage from one car into another. Without the subscription-model mobility, BEV are much less practical, because you need to build too many of them (making the raw materials more expensive), and you cannot make money out of them by overcharging for rides (making them expensive acquisitions, dependent on very localized/distributed charging infrastructure).

For fun driving (where sound and feel might matter), you will probably have to buy classics (or the equivalent of limited-run hyper-cars) in the near future, and run them on low-carbon fuel (which will hopefully establish an aftermarket for engine upgrades, to enable more E85/SAF conversions).