Now there is another firmware update that includes other little fixes besides compatibility fixes for lenses I don't have.
http://dl01.olympus-imaging.com/ww/u.../index22a.html
I've done the update now (I had skipped 2.1) & the one thing that may change (with settings automatically saved with the Camera Updater) is the SD Card Slot Settings, particularly if turning the camera on without one or both SD cards in. It's easily updated in Menu H1 though.Ver.2.2
(Aug. 30 2018)
Stability of operation when shooting still images has been improved.
Corrected issue of C-AF not operating correctly when using the "LEICA DG SUMMILUX 25mm / F1.4 ASPH.(H-X025)" interchangeable lens produced by Panasonic.