[cat199]

> The number of known quantum algorithms, which promise advantage over classical computation, is just a few

Not at all well versed in the topic, but to me, we are at ENIAC stage of quantum - those few algorithms where quantum has an advantage provide a huge advantage worth a high price tag to those who need them - so this shouldn't be a real worry for some level of viability, technical concerns aside (which are not insignificant, as you point out) - but also as you highlight, 'some level of viability' is not the same as 'instant changes everywhere', so perceptions of hype-vs-reality in the general population is a different question