I wonder why they have not upgraded PP to the newer version? That’s really the question to ask. You can still use the hub and learn but I wonder what the reason for not being on a newer version of the controller is?
I know you have to get a usb drive from Tormach to get from 1.9 to 2.x so that might be why they haven’t done it. Here is a link to the release notes for PP so you can judge the differences.
https://tormach.com/support/software/legacy-pathpilot-updates