I guess the ultimate question is how much real world noticeable diff would a home user see, given the speed of pixelserv already. I realize that is likely yet to be determined by testing.
It's possible to quantify it by tests but I wonder anyone will bother to do it. 'cos the process will be tedious and yet the measurement might fall with statistical errors.
With that said, a massively multithreaded server like pixelserv-tls will definitely benefit from more cores. Clustering two or more machines is one way to give pixelserv-tls more cores.
Modern browsers are heavily multi-threaded too. Paraell execution in nature. Hence, pixelserv-tls fits in well and fast. With more instances, responses are going to be even faster. That's for sure.
Routers/APs are abundant resources for users at home. Low hanging fruits shall get harvested. Other than initial necessary setup of pixelserv-tls just like running on a single machine, the key prerequisite is that: your adblock script shall be adapted to generated host files on two IP addresses fro a cluster of two pixelserv-tls.