Had a much better experience updating my desktop than my laptop!
On my desktop (Dell Inspiron 3670), I updated to Clover 4910 via Clover Configurator after making a copy of my EFI folder. Before rebooting, I checked the drivers64UEFI folder on my EFI partition, and noticed it had removed Aptiomemoryfix-64.efi and had added Audiodxe.efi. Thinking I needed aptiomemoryfix-64, I copied it back in from my backup EFI folder. I removed Audiodxe.efi. Rebooted and was able to boot into macOS just fine.
Next up, kexts. Via Clover Configurator, I downloaded the latest Lilu, WhateverGreen and AppleALC. I moved them from the OTHER folder to my desktop and installed with Kextbeast. Rebooted. Holding my breath, I was happy to see my macOS come right back up with new kexts.
Finally, macOS update. From system preferences, I initiated the update. Download complete, reboot. First Clover boot screen I chose the Preboot option. After a bit, it rebooted and chose the Install macOS option. Less than 15 minutes later, I was in macOS, no other reboots. 10.14.4 complete.
So, regarding Clover removing aptiomemoryfix-64...do I need that or has it become unnecessary? And, the addition of Audiodxe? It was not there before...do I need it now?
Desktops seem so much easier to update than laptops! Not sure if I'll ever get my laptop (Dell Inspiron 7559 updated!).