- Like what you've got: sorry, but it's time to move on. You really don't know what you've been missing. Bodies are better, sensors are better, everything is better.
- Dislike what you've got: if you like Fujifilm color, you don't have a lot of choices. The best choice would be to go mirrorless and get an X-Pro3, X-T30, or X-T4, but that means new lenses and flash units, too. If you want to stick with the F-mount you should probably move to a Nikon DSLR.
Some might say the their S5 Pro still has some legs left to it. Even the low-end D3500 will out focus it, out write it, and has a better sensor, in my opinion. State of the art has moved on. Considerably on. Digital parts for the older Fujifilm DSLRs are getting hard to find (though the non-digital stuff is mostly N80, and there are a lot of N80's to cannibalize out there).
Now that Fujifilm's fully back in the ILC market, I'd also tend to argue that the traditional Fujifilm user should look closely at the X-T4.
