Thank you so much for your answer.
It's a powder bed machine with a recoatinger and a printhead. Overall it has 5 motors and one and perspectively two heating units.
The printhead controlboard currently needs 8 Arduino pins.
I'm currently having a binder jetting machine running on an Arduino with RAMPS 1.4. Due to slow speed and general complexity this isn't really optimal, so I am looking for ways to upgrade.
Duet3D was one option to go since it has many integrated good motors drivers, 32bit architecture, etc., but if I understand correctly was mainly designed for FDM printers.
Thus what I'm asking is the following. Can I use the excess amounts of pins e.g. the extension pins to control w/e I want to or are there limitations that I'd need to know about before investing in a Duet2?