This. I’m a big fan of letting plants do their thing, but it does not really work that way with tomatoes. This time I pruned a lot in the beginning, then was busy with other stuff and they are going crazy again. I’m leaving one as it is, because it does a good job hiding my weed from neighbour’s eyes, but the other needs to get more side branches pinched out.
Fun fact: I had a lot this year, so some stayed in tiny containers for way too long. They grew up to almost 100cm in 250ml pots, but no excess side branches at all!