The ROM seemed to install ok, but my homescreen was very different. Apps were quickly installed -- too quickly. Google Disk always restores about 100 apps, but now it restores only 20. I downloaded Drive itself and looked. Sure enough, each backup had only 20 apps. I freak out. I removed the new Omnirom and installed a different one. The new ROM automatically put in everything.
When Omni started, Google Drive did not ask me to decrypt my files. Strange. That necessary decryption has most of my apps and settings.
Some have guessed I didn't install Open Gapps, but I did.
What's going on?? Thanks.