Arthur T Knackerbracket has found the following story:
[...] While it has been possible to get Alpine on the Pi for some time – Raspberry Pi 2 owners have been able to get it working since version 3.2.0 – this is the first version to add support for the Raspberry Pi 3 Model B+ and also offer an arm64 (aarch64) image to ease deployment.
The Pi 3 Model B+ packs a surprising amount of power into a small package, rocking a 64 bit 1.4GHz processor and gigabit ethernet (over USB 2.0). The 1GB RAM (unchanged from the previous Model B) should give the slimline Alpine incarnation of Linux more than enough headroom, depending what else you decide to run.
[...] Alpine's frugal nature makes it appealing as an alternative to some of the more resource intensive distributions available for the Pi, with optimisations such as OpenRC replacing systemd as the init system. A minimal disk installation will only consume around 130MB and the maintainers claim a container only needs 8MB.
-- submitted from IRC
(Score: 2, Informative) by DECbot on Tuesday July 03 2018, @02:47PM
For those looking for the second updated OS not mentioned in TFS, it is Raspbian.
TLDR summery: there are OS updates available to the Raspberry Pi! Choose either "noob friendly," systemd encumbered Raspbian or native 64 bit, systemd free, Alpine--now featuring minimal installs. Add only the GNU/Linux you need! Minimum install starts at 130MB.
cats~$ sudo chown -R us /home/base