There is some OS tooling in the SDN realm, like Stratum[1] for example, or a P4 board for the serious. But the hardware behind it isn't cheap.

I wish router for personal use were as "easily" programmable as an OpenFlow compatible equipment with a external controller. Even if you need some extra tooling to reach all the feature of RouterOS, like a compute node for the DNS. I don't know if this kind of evolution will ever reach the consumer space.

[1] https://opennetworking.org/stratum/