> Someone will fulfil the need as there is a high incentive to

And those uses which fall short of the new threshold, e.g. hobbyist SBCs, slowly fall away.

In reality were they going to survive anyway? I would wager likely not.

Raspberry PI is the defacto standard for SBCs. Almost all the other SBCs had significant problems usually around software support and also third party support e.g. Hats, cases etc.