Same view as me to be honest - it really would have to get silly expensive before I'd give it up.
The most likely issue we'll face with the internal combustion engine - is the reduction with the petrol station network. The large corporations that deliver and provide these fuels, usually within a mile or two of our front door, is not going to fund these stations with only a handful of cars coming through.
Even if they switch to mega-rapid chargers where battery cars get a 90%+ zap within two minutes - they aren't going to allocate space (and storage) to a tank of a few thousand litres of the good stuff.
Amazon will no doubt continue to sell it in 10litre shot barrels. Though with the reduced market for such refined petroleum, I suspect the likes of current racing fuels will seem cheap in comparison.
https://vpracingfuels.com/product/mr-pro6-ht-reg/?c=221