Back in the day, a number of people bought a m43 camera like the Panasonic GH4 specifically so they could use the Pana Leica 42.5. Then the GH5 arrived and it was almost a watershed moment for micro four thirds, especially for video creators. What began with the GH4, with people comparing the footage with cinema cameras from RED which cost upwards of $50k, led to the GH5, which video creators took up in droves. There are still many who use the GH5 for professional work, albeit not at the level that warrants a cinema camera like a RED or Arri.
Micro four thirds remains a solid competitor in the video/hybrid field, hence the release of cameras like the GH6 and GH7, but Olympus' niche appears to be for robust travel-ready cameras capable of handling birds in flight, some sports, and general outdoor use. The OM-3 appears to fit into the travel and everyday camera niche, or at least, that is where the marketing seems to point.