I have been using this for my ancient MX Master 2s for quite some time now.

I use it mostly to adjust the point where the scrollwheel no longer ratchets and just freewheels (Logitech put an electrically actuated lever that controls the ratchet into their mice), Solaar has an option to tune it, it works amazingly.

Not to mention how you can bind keyboard shortcuts to specific "gestures" using the palm button.

Solaar is awesome, thank you, Solaar devs!