I got a number 4 buzzy too. It's easier to keep clean and disinfect during the pandemic, also only takes 1 minute to wash.I am now wearing a buzz cut! I cut my own hair, because its very easy if you want a buzz cut. I like the feel of it, mostly because its hot right now in KY.
And yes I do my own. I'm not paying a hairy dresser $30 to shave my head. They can stick that where the sun doesn't shine.