If the market weren’t in decline, maybe. But to pipedream a little:
A standardized control board (imagine if it were something like an RPi), with modular carriage (available in several sizes, including capable of 11x17” or A3), with changeable print heads (CMYK, or just a massive black, or hell, pen plotter).
I think the bigger problem isn’t so much the traffic type as it is traffic destination. As long as there are only a few hosts or domains providing speed test services (and there always will be: upload speeds are expensive) ISPs will be able to whack-a-mole with their whitelists.
I’d say that this needs some sort of regulation, but as long as ISPs are the gatekeepers, they can cheese $Government all day long too. This word gets overused perhaps, but the closest I can come up with is a decentralized monitoring setup with random speed test hosts (especially hosted @home style). Care would have to be taken to avoid how-are-these-still-legal data caps though.
This might be slow, but what about using the lift gas in a fuel cell with atmospheric O2 for extra efficiency? You reduce the lift gas in the bags, and if you store the water aboard then you get extra ballast. You could even “unload” the extra electricity for use groundside.
The corollary pipe dream here is to line the entire interior of the envelope as a fuel cell membrane and use the airship as a portable battery.
Oh it does come from the network region/cells. In fact in the old days when the phones were the size of an actual brick they were probably powered by a proper multi-cell battery. (Did I miss a joke?)
A standardized control board (imagine if it were something like an RPi), with modular carriage (available in several sizes, including capable of 11x17” or A3), with changeable print heads (CMYK, or just a massive black, or hell, pen plotter).