Can I have my Plasma 6 and eat it too?

I'm really wanting to run the plasma 6 beta to be able to help find and fix bugs. How would also like the option to be able to switch back to 5.27 if i run into a larger issue. I ideally I would be able to switch back just from sddm. Does anyone have experience doing this? or guidance as to where I could start looking.

I use arch btw :)