Latest Preform and FIrmware with Form1+?

I’m currently running PreForm 1.9 and Firmware 1.4 on my Form1+ and wondering if it’s wise to update to the latest versions. I know a LOT of improvements were done specifically for the Form2 and don’t want to 'fix what ain’t broke", but if I can get even a minor improvement in print quality and speed it might be worth the risk. Thoughts?

I too am hanging on to 1.9.1. Works great. Not interested in pulling down Form2 code.