With improvement comes "WTF happened to my [your favorite thing goes here]?!?!?"
Somewhat useful Shortcut Keys Changed in 2.8x.
✦ EEVEE: EEVEE. A new physically based realtime renderer. It works both as a renderer for final frames, and as the engine driving Blender’s realtime viewport for creating assets. Only uses the GPU to render (no plans to use the CPU in the future).
✦ Ambient Occlusion:
I thought (for a while) someone left something out of the build! Viewport and Render options totally disappeared, and I had no idea how to get them back. I quit downloading and using updates! Seems a developer thought cleaning-up the interface was a good thing.
The progression to get the controls back goes something like this:
In Blender 2.81, in the Sidebar Panel ("N"), the Misc tab sometimes doesn't appear. I found a suggestion to run the "rig_ui_panels.py" script. Turns out to be the script GlassHalfRigs.py that adds the misc tab! Don't forget to select the Register option.