Status update 2020-12-15

[dukla2000]

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What is the difference between a nightly image and the installer image?
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The installer installs a 20201215 Mobian image on an encrypted disk. It installs onto the same disk you run it from - e.g. I put the image on an SDcard and am now running Mobian from that SDcard with an encrypted disk. You can apt update/upgrade to get to the same status as the latest nightly. The only option I recall (other than a password for your disk encryption) is the password for the mobian user: for sure not worth using the installer as it is easier to use passwd command for that which also allows 4 digit PINs - the installer requires 5. But essential to use the installer if you want an encrypted disk!

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What is Megi's Kernel? I know this can go too technical but is someone can explain this with plain words...
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@megous  is the developer who has done the most low level spadework to get the bits of PinePhone hardware working with the Linux kernel - an index to his notes is here.

Megi tends to concentrate on the next version of the kernel, so while 5.10 was released on 14 December, when he gets back to work in January I imagine his efforts will concentrate on the 5.11 Release candidates. In the meantime e.g. Mobian is using a 5.9 kernel to try for the stability Debian is famous for and Arch has a 5.10 kernel if you want to get closer to the bleeding edge. So megi did his last development of the AXP power controller in his 5.10 kernel, and certainly his latest work to control the Quectel modem. As @a-wai explained he has taken a lot (most/all) of those changes aimed at the modem and built them into a userspace library.

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What is eg-25 manager? does it need to be installed using apt? Is this a user interface or something that works at the OS level?
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As far as I can see you get it automatically - it works on its own without needing any attention and you just benefit from megi's work (in a 5.10 kernel) in Mobian (with a 5.9 kernel) as a result of @a-wai work. It is doing "behind the scenes stuff" managing the modem as per the announcement post above.

Disclaimer: I hope my use of words/terminology/examples is OK - certainly nothing is meant to deny the efforts of lots of other folk. And any mistakes are not meant to be provocative - they are merely a reflection of my limited knowledge!!