Install to inactive slot did not work? After upgrading from C.48(rooted) to C.60?
Edit: Yeah and the boot image is 64mb...
No, the installation fails when I try to disable magisk modules and try to update. Looks like the methods in OP are no longer working
Edit: Finally the below process worked for me with incremental update from C.48 to C.60
Incremental OTA with root:
1. Open magisk manager
2. Click Uninstall Magisk, then select Restore Images (Do not do a complete uninstall) and wait for it to finish
3. Do NOT reboot
4. Navigate to settings, and check for updates
5. Download and install the update as you would normally (It will download the incremental update, not the full 2GB+ file, saving you a lot of bandwidth)
6. Once done, open up magisk WITHOUT REBOOTING
7. Tap the install button, and select the 4th option (Install to inactive slot), once done, your device will reboot and you will be on the new OTA, with root, preserving your magisk modules if you have any.