I attached PR in my first post about this issue 8 hours ago. I started with 13.1 because my installer is at that version. I understand that you have a lot to read but i already answered to all and provided PR with that tool.
Please note, i do repair notebook for living, i am not tryn to waste your time with nonsense. I do have a clear feeling that there is some degradation going on while using this notebook, while on the contrary on my 840g1 thing got stable after fixing initial problems.
I will recap : 1 i have a slow boot problem (attached photo on OP) that is not coming from fsck but rather problem with kext stall, not apfs related (i have apfs on my 840g1 without issues). The problem stuck with different SSDs . Upon reinstalling, first week all goes well, then it slowly starts to happen more often till it comes up every boot.
2 Ethernet cable is not working after installing acpi and config from github. It works when i start from the usb installer created with you notebook config guide.
3 (strangest one) suddendly my ethernet became super slow. FIxed now with reinstall. Was not able to track down the issue but the PR files i attached are from that config wich had the issue. More strange, while i was uploading the PR files, problem went away for a couple of minutes.
THINGS I DID ALREADY AFTER THE WIFI PROBLEM APPEARED: made sure git was up to date, EC reset, switch between aptiomemoryfix and aptiofix v1 and v2 and your custom clover builds, upgrade bios to latest version, upgrade system from 10.13.2 to 10.13.3 (losing audio in the process, restored with pre_patch), switch different wifi cards, reinstall drivers on windows, bios reset to factory defaults and re apply settings from guide.
