Also, plenty of physicists are now skeptical of the idea that quantum computers will be intrinsically faster than classical computers for most tasks.

Tbh, this isn’t really that new of an idea. Quantum computing requires temperatures less than 3 Kelvin. It doesn’t matter how efficient your processor is, getting anything down to that temperature requires a lot of cooling equipment, so much that it’s utterly impractical for general use.

It’s kinda like analogue computing, aka comuting with analogue signals instead of digital. You’re able to solve problems extremely fast, on par with (if not superior to) quantum computing. The downside is that the circuits have to be custom designed for the use case, making it impractical for most tasks.