About laptops without ethernet, there's simple solution, don't buy such crippled devices. If you already made that mistake, then suffer. It's the equivalent of touching hot stove, it's an important life lesson. I know it's not helpful, but I couldn't resist. Don't take it dead serious. :)
But not all is lost. There are usb to ethernet adapters, and RBs that should work with usb power exist too. Connect them together and you have working solution. Not exactly elegant one, but possible. And yes, I do believe that if MikroTik made it into one integrated product, it could actually be an interesting device.
Excessive quoting is useless and annoying. If you use it, please consider if you could do without it.