Like my 1998 BMW … it’s an ancient machine at this point and it was originally a performance bike when it was new and would have benefited from a high performance tire … but its 26 years old and I really don’t trust it to go fast any more

I guarantee your '98 BMW is still way faster than my '90 Miata, and even that is still a sports car that still deserves and requires decent tires. Therefore, yours still does too.

I wasn’t being hyperbolic when I used 49cc scooters as an example – I really do think that’s pretty close to the limit of how much power a motorcycle can have and still reasonably use long-wearing, not-very-grippy tires.