I don't know what #Debian is doing to run so quietly on my HP laptop with Intel i7, but I'll take it.
I had to re-generate my Twitter API key, secrets and token after temporarily deactivating my Twitter account https://developer.twitter.com/en/docs/authentication/oauth-1-0a
Twitter API test
I don't know if having the same OS (Debian Stable) on both computers makes a difference, or if I'm doing things in a more systematic way, but I have had no Syncthing issues — and I'm syncing 187 GB.
My Debian Stable system wouldn't update from 11.5 to 11.6. I tried apt-get clean, but that didn't work. Instead I removed the package lists with # rm -r /var/lib/apt/lists and then did an apt update. Then I got all the new packages.