Linux has been ready for ARM for a long time, Android is linux and have been running for a long time. Also see the Raspberry Pi and PiOS, based on Debian.
I run a Pi and there are boat loads of things ARM ready
I have just been round my small setup and run an OS update, took about an hour. That includes a reboot of a dedicated server with OVH.
a pi and mini PC at home, a dedi at OVH running 2 LXC and 5 qemu vms. All deb a mix of 11 and 12.
I spend Wednesday evenings checking what updates need installing, I get an email every week from newreleases.io with software updates and run Semaphore to check on OS updates.
I live under a rock, so whats a threads and who is Mark Zuckerburg?
I gest, I really dont care that Mark is on the fediverse. Till my Lemmy instance is full of threads crap and I have to route via the Zuckerburg hive mind.
A and AAAA records can have different IPs, the VPS will know it's the host for your A and to forward AAAA to your home IP