Trying to understand OTA updates

[Carrzy]

I would like to get to the point where I'm able to OTAs instead of manually flashing factory images but I'm not passing safety net when I uninstall magisk and reinstall it when the update reaches step 2. I'm not sure what is causing the update to fail. I recently switched from system root via supersu (obviously wouldn't pass safety net) to systemless root with magisk. I'm running 8.1 feb. security update with the following apps installed: adaway, busybox, CF. Lumen, greenify, magisk manager, & titanium backup. (rootless substratum & andromeda as well).
I do not have TWRP installed, I only boot to it to flash magisk and kept TWRP systemless. The purpose for this post I guess is to try understand which of the installed apps listed may affect the /system files. I was under the impression that since i now root systemlessly I would be able to accept OTAs. What am I missing here?

 

[Kream24]

As far as I know you cannot be rooted and/or have a custom recovery. You can have a unlocked bootloader but you have to be stock in order to receive OTAs.

 

[onesolo]

I really don't get the problem. Just flash full ota file via TWRP and then flash again magisk and twrp again.

With TWRP, flashing full OTA files is a breeze... I think incremental otas can be done in the same way, but better to flash full ota files...

 

[Carrzy]

I really don't get the problem. Just flash full ota file via TWRP and then flash again magisk and twrp again.

With TWRP, flashing full OTA files is a breeze... I think incremental otas can be done in the same way, but better to flash full ota files...

......... you can flash full OTAs from TWRP?? I knew I was missing something.

So download the full OTA to internal storage. flash in TWRP. then magisk and if i choose not to install TWRP (i usually only boot to it), I'm done?

 

[niko26]

I really don't get the problem. Just flash full ota file via TWRP and then flash again magisk and twrp again.

With TWRP, flashing full OTA files is a breeze... I think incremental otas can be done in the same way, but better to flash full ota files...

Wait, doesn't flashing the full OTA get rid of TWRP?

Do you have instructions how to install full images without TWRP being uninstalled?
Also... How do you get ota to install if the original bootloader is replaced by twrp? I thought installing twrp permanently voids the possibility to install ota...!