What are you doing with your photos? 24MP is more than enough for almost any format, except maybe the largest of prints. But you’d need to get good framing in camera, without as much room to crop.
All indications are that Nikon won’t be making a Z7iii, so if you want more pixels I’d go Z8. They’re on sale for $500 off right now. Also if you run DX glass, or set to crop mode, you’ll get 20MP files, so fairly close to your d500 right now.
Is a full on fascist dictatorship the “status quo” now? Surprised billionaires would be behind this.