In 2018, I put up a new pole barn on the site of a 1881 post and beam barn that my great great grandad had built. In 1980, my grandad ran a direct bury line to that old barn, from a 15 amp breaker in the basement of the house, 200 ft away. That line went only to a single 120 volt outlet on the corner of the old barn. The only thing I remember us using it for, was to plug in the motor on a conveyer, for loading hay bales into the loft.
When I dismantled the old barn, I flipped the breaker off and took off the outlet. I ran a 2" conduit to the basement, while I was doing the site work for the new pole barn. Someday, if I ever have need for more power, I will run lines thru that.
In the mean time, grandpa's old direct bury 15 amp line, from 1980, is working very well. I use (3) 4 ft LED lights, a garage door opener, drill press, table saw, band saw, 2 hp shop vac, small air compressor, and a few other power tools, with no issues.