100Gbps over the LAN is unlikely to do you much good because not only is it expensive to get that kind of bandwidth end-to-end over the internet but most OS’ network stacks and protocols (HTTPS/etc) are not efficient enough to take advantage of it (you will be bottlenecked by the CPU). So there is very little consumer and even business (outside of datacenters) demand for it because even just sticking a 100Gbps NIC and pipe in a consumer machine is unlikely to give you any more than 10Gbps anyway.