Why is lack of ethernet an issue? It's designed to be a small thing you stick behind your TV out of sight out of mind, powered off USB and connected via HDMI. It's designed for wireless use.
In my particular case, even though I live in a detached bungalow, something about the construction of the house really affects wireless signal. I've got a powerful router and I've tried various repeater and mesh products, but the amount of times the connection would drop midway through watching/doing something just got annoying. In the end I put up a loop of conduit around the house and every room has at least 1 wired connection - the only time I experience dropouts now is when the Virgin broadband drops out.
Regardless, you can't beat a physical connection where such a thing is possible.
As always, there's no one media device that's the best of all worlds, so you have to compromise on something.
There is no sacrifice that would be needed for wired ethernet support, even the basic USB powered devices from Amazon and Google have the ability to add in ethernet via an on-the-go device connected via that USB connector.