I have lots of galleries up there. Some of them are sports. I'm a part-time sports photography and journalist. You aren't interested in helping anybody. You are a FF Nikon bigot.
Hmm, according to you, am I bigoted against Nikon full-frame cameras or bigoted against anything other than Nikon full-frame cameras? It's confusing to me. I want to be sure I'm getting this right.
Because, I've tried to dissuade the OP from using older Nikon flagships. A long, fast prime is outside his budget range and cropping robs a full-frame body of any potential light-gathering advantage it may have offered. Rather, I've encouraged him to use less expensive crop sensor bodies, such as his D7500, with something like a first gen Tamron 70-200mm f/2.8 Di VC USD.
I suppose that makes me bigoted against Nikon FF cameras. But wait, I own a Nikon FF camera. I use it for landscape photography. I've used it to shoot college football & basketball and have gotten good results but would now bring my Nikon D500 to shoot a game. The APS-C body is better spec'd and a better match for the lenses I have.

Game-winning TD catch against the #2-ranked (at the time) team in FCS.
You want to convince the OP to dump M43 to prove how smart you are. Nothing you have to say is worth the time to read it. You are on ignore from here on so post away. I won't see it.
What I've been trying to do is help the OP find gear within his budget that will serve his goal of doing better sports photography. Apparently, you disagree that the 40-150mm f/2.8 would be a good lens to consider for the sports photographer who shoots M43. I've not used the lens. I'm assuming you have but found it lacking. Please, describe its limitations for sports.
You don't even own an M43 system. You don't know the limits or how to stretch them unless you have one. You are making it up to support your argument.
As said previously, the thread is more about the technical needs of low-light sports photography; of capturing peak action with a camera - any camera - working with minimal light but delivering a good image.
It's not primarily about the suitability of M43s. Equipped properly and in the hands of someone who knows what they're doing, just about any format can be used to do sports photography. Given that the OP is on a budget, we need to be open to recommending crop sensor systems.
That said, it's also important to be realistic and to recommend lenses and settings that will be compatible with his goals for making quality photos.
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Bill Ferris Photography
Flagstaff, AZ