Good idea if you have rock solid ground that is hard to dig up. If you don't cover the holes you can use them for herbs & annuals. also lined with weed barrier cloth & used rebar in several places for stability. It makes maintenence super easy.
This could make a good outdoor kitchen shelter. Make a Stand The folks at Skonahem offer some inspiration with a cosy little kitchen created in a half shed. Perfect for hanging pots and pans, etc from the wall. Photo by Madeleine Söder for Skonahem.