Despite skyrocketing megapixel counts, computational photography has always been the key to the success of smartphone cameras. OM System has apparently taken a page out of the smartphone photography playbook and plans to lean into computational features, even at the cost of megapixels. https://www.notebookcheck.net/OM-System-aims-to-beat-smartphones-at-their-own-game-with-focus-on-computational-photography.979410.0.html
I just bought a used OM-1 MK1, and I am not concerned about the 20 mp sensor. My initial pictures are showing plenty of details and resolution for what I need!