Has anyone scaled back from 5gals to 3gals or 1gal?

I’m thinking of scaling down. When I started brewing, everything was 5 gallons. After having made some terrible beers over my time, and with so many options I want to try out and compare, I was thinking of scaling down. For example, if I wanna compare yeasts, maybe I make a SMASH beer but 2x1 gal. Use yeast A in the 1st gal...