@CaseySJ find below:
Disk6 is my boot disk, and it's a:
Samsung 970 Evo 1000GB M.2 2280 PCI Express 3.0 x4 (NVMe)
I have NVMeFix.kext running
Here is video of whole boot process in realtime
https://streamable.com/j0zrdz
2021-10-26 21:26:01.395686+0200 0x508 Default 0x0 0 0 kernel: (apfs) spaceman_scan_free_blocks:3153: disk6 scan took 61.377320 s, trims took 60.993880 s
2021-10-26 21:26:14.464883+0200 0xd44 Default 0x0 0 0 kernel: (apfs) spaceman_scan_free_blocks:3153: disk7 scan took 10.894260 s, trims took 10.809495 s
UPDATE:
Tried removing the SSDT with the result = No Difference
Tried removing SSDT and Disable TB in BIOS = No Difference
Tried Removing SSDT/Disable TB/And turn off my TB-Devices on boot = No Difference
On all steps above it still takes a LOONG break between the lines:
Thunderbolt DP - activation resolved - DPO
and
Ignoring kextcache invocation from early boot
I haven't tried removing the TB-Card or change PCIE ports though!
UPDATE2 : I saw your post from the Z390 thread, about the Samsung 970 Evo, so now i guess i know the cause.
I'll wait for Acidanthera to see if they find something. Otherwise i guess i just clone everything to my Intel NVME instead