The Loupedeck has become an indispensable tool for me in photo editing with Lightroom Classic. The knobs are more precise and easier to use than the sliders with the mouse. I have placed my most important presets on function keys of the Loupedeck and so they can be called up simply by pressing a button.
The learning curve is short and the setup software is easy to use. Today I use the Loupedeck under MacOS BigSur on an iMacPro, but it has also worked without problems under Catalina.
My most recently processed photos can be seen in this virtual exhibition:

https://artspaces.kunstmatrix.com/de...

The Loupedeck is also so light that I took it with me on trips from time to time, when one could still travel without problems.
In Photoshop, however, I prefer to work with the Wacom tablet, and have never tried the Loupedeck in Photoshop.