I think it's interesting what OMS said in a recent interview:
Why OM is stuck with 20MP sensors:
Balancing high sensitivity performance and high definition is a major challenge. We also carefully evaluate the sensor readout speed, which is crucial for computational photography. For high-definition shots, the camera captures 12 images when used on a tripod. It therefore needs to read the data very quickly. We also need to maintain a smooth and responsive workflow, from image capture to saving.
Sensor read speed remains a priority. Perhaps in the future we will offer higher-resolution sensors. However, we believe the current resolution allows for much easier data management, which represents a significant advantage for our customers.
We believe that software advances help to reduce the image quality gap traditionally attributed to differences in sensor size.
To me, that statement can be taken on of two ways.
First, they are saying that 20mp is a technical barrier, that currently they are not able to overcome, that allows the faster shooting speed and all the computational photography that's built into the high end camera bodies like the OM1 II.
Or, OMS is such a relatively small purchaser of sensors, that they have no roadmap available to them for buying or developing anything with more resolution., so hyping up the capabilities of the existing 20mp sensor is all they can really do.
Either way, it looks like OMS are sort of boxed in a corner with tech. It doesn't help (as I mentioned in another post), that their once great asset (size), has been slowly eroded away over the years. With bodies like the Sony A7C II and A7CR now even smaller and lighter that not only an OM-1 but an OM-3 also, (and with massive resolution boosts) and even the main pro bodies from for eg Sony (with the A7V and A7RV) barely any larger than an OM-1 and not much heavier. Also with new lenses from the FF brigade also getting smaller and lighter, (look at the Nikon Z 400mm F4.5 and 600mm F6.3 PF for instance), and aside from Computational photography, it's becoming increasingly harder to know what Micro Four Thirds brings to the party aside from the aforementioned Computational aids, and nostalgia ?
I for one really hope that OMS, can launch a bit of a wow camera in the next few months (i.e. an updated Pen-F II) to really regenerate interest in the format, as if we are being honest, it's pretty much stagnated over the last year or so ? Not saying they aren't good pieces of equipment, but you need people to upgrade their bodies and buy lenses to keep for format alive, and for those that already own an OM-1 or an OM-3 (or to an extent an OM-5), I just don't see where current owners are going to spend their money in this system ?
I'd be really sorry to see the format totally collapse and just exist on the
second hand market in the next few years, as I still believe it has potential.