I think Premium users tend to be the most affluent desirable group for ad targeting (similar to iOS users on other platforms) and even though YT Premium lets you avoid ads on YouTube, I suspect one's activity feed/"algorithm" on YouTube factors a lot into Google (and others'?) ad targeting. The same eerily effective feedback loop for getting TikTok and YouTube suggestions works better with short-form video, so even if users aren't seeing ads, YouTube still has an incentive to have people use it. So, there's money to be made in dialing in your "algorithm" from using YT Shorts even if you're a premium user.
I'm sure the other stuff about KPIs for increasing usage of shorts to compete with other media sites is accurate too
I found this a bit silly given the headline: "well duh, that's the theoretical limit barring fancy quantum entaglement nonsense or similar!"
TIL all electromagnetic waves, including radio which Voyager 1 [uses](https://en.wikipedia.org/wiki/Voyager_1#Communication_system), travel at the speed of light. For some reason I always thought we had satellites doing some slower process or needing to somehow "see" light photons coming back from the probe to achieve near-lightspeed communication.