I'm not thinking about myself, the desktop I do Social Media from can do almost three hundred, and indeed RSA 4096 seems fine on that PC, but lots of people have crappy under-powered devices like Raspberry Pis. How many can those do? Four? Ten?
We're in the weeds here, we're agreed that if your weakest point is a 2048-bit RSA key you're in unexpectedly good shape, definitely anyone who feels 4096 even "might be" too slow should just use RSA 2048 (or get an elliptic curve algorithm that's nice and fast on their CPU). I was just pointing out that "too slow" doesn't necessarily mean "Not as much peak throughput as I would like". Station wagons full of tapes remain sub-optimal for video conferencing :D
We're in the weeds here, we're agreed that if your weakest point is a 2048-bit RSA key you're in unexpectedly good shape, definitely anyone who feels 4096 even "might be" too slow should just use RSA 2048 (or get an elliptic curve algorithm that's nice and fast on their CPU). I was just pointing out that "too slow" doesn't necessarily mean "Not as much peak throughput as I would like". Station wagons full of tapes remain sub-optimal for video conferencing :D