Up to and including Blender 2.79, when you creased edges, stacked Subdivision modifiers had a different effect on the creases: the first subdivision modifier kept the crease fully sharp, while a second subdivision modifier fully subdivided the output of the first subdivision modifier, including rounding of the creased edge.
But in Blender 2.8 a second subdivision modifier keeps the creased edges fully sharp. The 2.7x approach allowed the rounding of creased edges to be controlled by stacked subd modifiers. This is not possible anymore with the 2.8 subd modifier approach.
Please bring back the old approach, or add a ‘Round creases’ option that can be activated in a second Subdivision modifier. Modeling using creases and stacked subdivision modifiers is a powerful workflow for hard-surface modeling, avoiding the need for lots of extra edge loops.
Now subdivision is handled by OpenSubdiv and I think they did not think about this use case, maybe a checker to disable the effect of creases could be the solution, or a modifier to change creases inside a mesh, but this last one is more complex.
Thanks for your feedback, @JuanGea . Sounds good. I’d love to tinker with OpenSubdiv, but I don’t think it’s available in Blender for macOS, unless the Subdivision modifier in Blender 2.8 uses OpenSubdiv by default, but in that case I’d expect additional settings, such as the Chaikin subdivision algorithm for better crease handling.
Interesting. It wasn’t available for Blender macOS up to and including the latest 2.79 master builds. I thought it had something to do with Apple’s bad OpenGL support.
I expect that my next computer will be a Windows machine again. In Blender for macOS Cycles doesn’t support OpenCL anymore, there’s an OpenVDB add-on that’s only available for Windows, NVIDIA / CUDA has better GPU benchmarks than AMD / OpenCL, Apple has ceased OpenGL and OpenCL support in favour of Metal, and I guess OpenSubdiv also doesn’t work in Blender for macOS.
Yes, the attraction of Linux grows every year, but one of my macOS frustrations compared to Windows is the relative lack of software availability on macOS, and I guess Linux is even more a niche compared to Windows, even though Linux is technically very cool. So I guess I’ll return to Windows after a number of macOS years.
Hi. You could install Linux (Ubuntu, Mint, etc) in a separate partition of MacOS or use a LiveCD / Pendrive with a self-starting linux distro. You do not have to buy a new PC and you could use the Mac differently with Linux inside.
In Blender for macOS Cycles doesn’t support OpenCL anymore, there’s an OpenVDB add-on that’s only available for Windows, NVIDIA / CUDA has better GPU benchmarks than AMD / OpenCL, Apple has ceased OpenGL and OpenCL support in favour of Metal, and I guess OpenSubdiv also doesn’t work in Blender for macOS. 
I just didn’t realize that you can even run Linux from a pendrive.