In Canada, Olympus was running at 2% market share. If that was true in other markets, then those numbers are unsustainable for a midlevel consumer product. Maybe Leica could survive with that amount of share. In Canada, Pentax has an even smaller market share, although they do well with "sport optics" which is likely keeping them afloat. "Sport Optics" are binoculars, and rifle scopes. That said, I think Pentax will be next to go. Nikon's market share has dropped to third position, as they were slow to adapt to mirrorless which has caught up to them. They've brought to market a first generation of mirrorless, while Sony is flying past with multi-generations of up-dates, new features, and new models. However Nikon makes a great product and that will keep them going. The market has switched to full-frame. I'm not saying that everyone needs a full-frame, just that the market has switched, and the market is the driver in cameras.
In years gone by Olympus had a presence in the pro market with cameras like the OM1 and OM2. Great products but little market share. They didn't convert to AF well, and lost more share when things went digital.I thought the OM4TI and less popular, but very nice OM3TI, were great products, but not the build quality of Nikon. Olympus did make a 180mm f2 that I saw once at a news photographers tradeshow that was a beautiful looking lens and always endeared me to the system.
It's unfortunate for those the have bought into the Olympus system as it's unlikely the new owner will develop new products. It's the same company, I believe, that bought the computer line from Sony, and ran it into the ground.
That's how I see it anyways.