Is there a separate update process in macOS required to get updates for the unix tools and system manuals? For example, according to man screen Apple packages screen ver 4.0.2 (January 2004 vintage) with macOS 10.14.6; that release was 16 years ago this month.
No. There is no separate process to update Unix tools/utilities.
It’s just very unlikely that ...
This is something that must be extrapolated as the 2015 through 2017 MacBook Pro's aren't vastly different than the 2018-2019 MacBook Pros. The key functions:
* Audio → Not Working
* Suspend & Hibernation → Partially Working
* TouchBar → Partially Working
* TouchID → Not Working
* WiFi ...
The only real issue I see here is the mentioning of /usr/local/etc in the man page. This most probably is just an oversight by Apple when they copied the man page 1:1 from the distribution. On Mojave, screen reads the default configuration from /private/etc/screenrc (which doesn't exist unless you create it).
$ strings /usr/bin/screen | grep screenrc
If you don't want to use extra keyboard and mouse drivers you need at least version 5.3 of the Linux kernel (the current stable version is 5.4.8). As mentioned in your link to State of Linux on the MacBook Pro 2016 & 2017
Keyboard & Touchpad
Works out of the box with Linux 5.3 and above.
For earlier Linux versions you can get the ...
Since iOS 13, you are able to access SMB shares with the Files app. Just set up your share in the Linux system (I recommend usershares), create the user on samba (while samba allows you to have the same Linux user, it requires that you use samba specific utilities to set up the password) and use "Connect to Server" within Files on your iOS device.