Like many folks, I've been using ALARM on a variety of pogoplug devices (Kirkwood) for years. They serve various dedicated purposes and while I love ALARM and am terribly disappointed to see support end, I understand that the maintainers have limited time and would prefer to focus on newer platforms. I'm grateful for all of the time they put into arm5.
Two things would be very helpful:
1) Instructions for how to use pacman now that mirror.archlinuxarm.org no longer contains arm5el support. This is needed if, for example, you want to add a package to an existing installation.
2) Step-by-step instructions for migration to Debian or another distribution that continues to support arm5. Someone was kind enough to provide a pre-built Debian binary for PogoPlug v4/Mobile SD cards (here: https://github.com/susamn/debian-10-buster-pogoplug-v4), but I've spent a fair bit of time today trying to get a Pogoplug E02 to boot Debian on a USB flash drive without success (and yes, I have a serial console). The alarm u-boot won't boot a Debian rootfs but boots alarm just fine.
If one of the maintainers could help with these, I would be grateful and I'm sure a lot of other folks would too. Thanks!