I am a m43 user and not offended at all re the issue of why jump into M43. M43 is a very specific camera system. It has limitations that the user really has to know about and deal with.

Unless I needed M43 for travel, or wanted to really downsize to the OMD em5 and smaller lenses I’d just sty with Nikon.

Also that beast of a lens is pricy, heavy and really would only be used effectively by a small number of photogs. 150 to 600 is equal to 300 to 1200 in ff terms. I can’t imagine wanting or using it.

The Oly pro lenses are very special super sharp great lenses. But getting into all that would cost a lot of $$.

I don’t think the juice is worth the squeeze in this case. Stick with the gear you have.

I am a m43 user and not offended at all re the issue of why jump into M43. M43 is a very specific camera system. It has limitations that the user really has to know about and deal with.

Unless I needed M43 for travel, or wanted to really downsize to the OMD em5 and smaller lenses I’d just sty with Nikon.

Also that beast of a lens is pricy, heavy and really would only be used effectively by a small number of photogs. 150 to 600 is equal to 300 to 1200 in ff terms. I can’t imagine wanting or using it.

The Oly pro lenses are very special super sharp great lenses. But getting into all that would cost a lot of $$.

I don’t think the juice is worth the squeeze in this case. Stick with the gear you have.

Not sure why you are asking the question, if you mostly use your D500, why ask about the D7200 versus the OM1? The D7200 (and D500) is a completely different camera than the OM1, which is a micro 4/3 mirrorless. Assuming that you have only Nikon lenses, you will need to get an OM systems lens? Have you picked out which? I have heard good things about the OM-1 camera but my personal view is that I wasn't thrilled at the lens choice for wildlife photography. Micro 4/3 users always are going on about how lightweight their system is, but the "replacement" for the 100-400mm lens (the 180-600mm) is much heavier than many Nikon lenses and even heavier than their 100-400mm TC f/4.5 lens. Some day I may switch to the OM system (I have both the D7200 and D500 and happily used both for many years but mostly use a Z8 these days) but would want an updated light weight "long" lens before switching for my wildlife photography. That is purely my view as a Nikon user.
I am sure there will be many OM users who will be offended by my comments, but are you really excited about their new lens, the 180-600mm? It is $1,000 more than the Nikon 180-600mm, doesn't have internal zoom and weighs more than the Nikon lens.

After I finished three days worth of raking yesterday, I went to Kingsbury Wildlife area. I wasn't expecting to see so many sandhills cranes at one of their stops, but there were probably 500-1000 enjoying the great weather, nearby water, and food

These fliers looked beautiful against the sky, but I used Neo to add a little more interest