It's the reason I went back to a MacBook. What drew me in is the desktop class i7. At the time the Mini outperformed all other Macs in benchmarks, and it is noticeable and fast during compile times etc.
Once you connect a 4k Screen (or even more screens), an eGPU becomes a must have. The integrated one just can't do smooth UI rendering. For example typing in IntelliJ always felt laggy, because it takes so long to redraw I guess. Or things like Google Maps on satellite view in a big browser window will stutter a lot. All the subtle macOS animations aren't smooth and so on.
Bothered me so much I had to sell it. Was thinking about keeping it as media center for the TV, but again, no GPU makes it less then ideal, and its way too powerful for the job otherwise.