This is the 'withered technologies' playbook in action - use underpowered/mature technology in new and fun ways rather than relying on cutting-edge graphics technologies. As an example when the switch was launched in 2017 the CPU on the SoC was from 2012.
Nothing in the Wii was cutting edge in terms of the technology - it was just well implemented. The motion controls were 2 IR dots and a cheap camera, and that wasn't a new concept.
Similarly nothing in the switch was actually cutting edge technologically, just assembled into a great product.