I think that these days there's a lot of convergence going on - everything is essentially serdes in some form - some chips just have N serdes lanes and let you

I think that these days there's a lot of convergence going on - everything is essentially serdes in some form - some chips just have N serdes lanes and let you config them for PCIe/ether/data/USB/etc as you need them, much as more traditional SoCs config GPIOs between a bunch of other functions like uarts/spi/i2c/i2s/pcm/...