With all the big E-M1x news lately you may have missed the large firmware rollout. Olympus has updated the following items:
8mm Fisheye Pro
25mm F/1.2 Pro
45mm F/1.2 Pro
The cameras are mostly small operational fixes and the update to support the new Flash radio triggers. The lens updates are mostly for E-M1x compatibility.
I don’t consider any of these major updates that need to be done asap. I tend to keep my cameras up to date, but if you are traveling or about to shoot a major project…i’de wait til after.