"The study involved 105,614 women in California with an average age of 53 at the start of the study"
"The study had limitations – it looked only at women, and participants reported their own diet data – but independent experts suggested the findings were significant."
Notice the quote says "build on the ATProtocol", not "build on BlueSky". It could be argued that the more this is done the less defacto power BlueSky will have. And people are doing it. Some examples are listed in the Wikipedia article, but there are more.
Interesting that they named not a single individual influencer, 'station', or organization in that entire lengthy article. One might think with a claim of so many of them that at least one could be named as an example?
You seem to have descibed your port forwards backwards It is the router forwarding the ports to the gateway pi (and potentially other devices), not gateway pi and other devices forwarding to the router. The forwards to servers are incoming from the internet.
(Theoretically you could have your pi physically between the router and the internet (modem) acting as a sort of pre-router, but this would be unusual. Perhaps you could describe your physical setup more clearly. What is physically/wirelessly connected to what, to the internet.)
Your freedom is in the (theoretical) ability run your own instance and communities on it if you disagree with or have been banned from other instances. And your instance can federate with whomever will allow it.
Communities also want freedom -- to be organized and run the way they want to be, and to be free from being hijacked or shit on uncontrollably by randos, bad actors, or even (defined by themselves) undesirables.
It's not perfect. But you sometimes have to consider a bigger picture than just your personal freedom, to make things a free as practically possible.
NextCloud has end-to-end encrypted voice and video chat, and of course a whole bunch else, since people are mentioning self-hosting. The corresponding Android app "nextcloud talk".
There is a general perception now with many in the US and even more among the US's partners that the US government is now actively regressive, making life more difficult for most of its citizens and partners, and indeed the world. China, despite its shortcomings, is mostly seen as making progress at raising living standards, moving more towards being environmentally responsible, and as a stable and predictable partner.
Whatever the complicated on the ground realities, these are some of the ways that make China currently seem to look better too many. Since you ask.
I used to use earlyoom on an old laptop and it worked well for my purposes.
I hear there is a systemd-oomd, but I never tried it.
Edit: sorry I misread your post to be about memory rather than CPU. Too early on the morning for my brain to work.