Sorry if it's a bit misleading! Wasn't my intention.
However, there's nothing stopping me from getting a data SIM from my provider (who does allow forwarding ports over LTE). I just currently don't have any spare SIM cards at hand. But that is the plan.
Although the latency will likely skyrocket, I would be very interested in measuring the energy efficiency. The main CPU could even be completely shut down.
You can even imagine calling the main CPU as backup if there are too many incoming requests, though it would be better to use a (likely available) ethernet-over-USB instead of ADB forwarding, and that scenario is unlikely if just for a static blog.
Anyway, if you do so, please make sure to publish a new blog post, post it here, and plot the power consumption during the hug. That would be some interesting data!
However, there's nothing stopping me from getting a data SIM from my provider (who does allow forwarding ports over LTE). I just currently don't have any spare SIM cards at hand. But that is the plan.