Bought 60D as my first system camera in 2013, the beginning of the interest in cameras.
7 years later the Canon 90D, take the step up from beginner to enthusiast.
+ 4K resolution that utilizes the entire sensor and no crop zooming.
+ Dual Pixel AF + in 4K
- The only thing I can see is that the quality and photography in JPEG gives off a watery image even though it is a 14MP larger sensor than the 60D. (If you, like me, shoot in RAW, the image quality is not affected or watery)
I notice most of the benefits if you do a lot of film like I do. Otherwise, it is equally positive in photography.