Imagine you have a portable laptop that works for 95% of all your use cases except those days when you need a cluster of GPUs training a ML model or doing some large-scale scientific calculation.

Imagine having a fridge that isn't cold enough for storing ice cream and frozen veggies.

And yes, none of my shoes are even remotely close to covering 95% of floors. Some are good for hiking, some are good for running, some are warm in the winter.

The issue is not the lack of 100% coverage. The issue is that there is no sufficiently appealing option for a large number of people to get access to the 5% of cases when you do need it. Apparently rentals and other sharing options aren't quite up to snuff, so everybody overprovisions like crazy.