Over the last few years, Fujifilm has produced several brilliant mirrorless cameras. The X-T line of cameras and the X100 series are my favorites. Fujifilm frequently updates these cameras, and this greater selection means that there are better value options available if you don't need the latest and greatest.
In a recent video from Kinotika, Zach Mayfield discusses the differences between the Fujifilm X-T3 and the X-T4. Right now, the biggest difference is the price point. You can purchase an X-T3 for less than $1,000, whereas the X-T4 is almost $1,700. The price difference is pretty significant; however, the differences in features and specifications aren't.
For example, the sensor in the latest camera is the same as the previous model, meaning that if you're a photographer, there's very little to gain by purchasing the latest model. The autofocus performs very similarly, and image quality is identical. Also, the fact that it's not a tilt screen may annoy some photographers that don't like fully articulating ones.
The addition of IBIS could be helpful for some photographers, although it depends on your shooting style and environment.
For videographers, there are a few compelling features that may sway some; however, considering the price difference, I still think the previous model is far better value for money.
Check out the full video linked above to see all of the major differences between both cameras.