I have a Pixel 4 running LineageOS 24, what I waited with this update is the Blur UI, but unfortunately it is somewhat turned off.
There is an option in Developer Options to toggle this on, but whenever I leave the Settings App, it will automatically revert back to off. There is no option on Accessibility to Reduce Blur, meaning (if im correct) this UI is intended to be turned off to reduce the gpu load.
The option I found and tried is by rooting my device and installing Enable-blurs module and its great knowing it can actually work. Also, adb method to enable this Blur UI is not working.
But, my problems are, apps keep crashing. I noticed after root, apps like Google Camera and Google Photos App keeps crashing, closing the only fixed i found with this issue is by unrooting my device, and dont like rooting.
Right now, my device is unrooted.