When beaching capital ships for repairs stopped working

When did pulling capital ships onto a beach for work stop being practical?

As ships became larger, and especially with iron hulls, dry docks became the practical choice; the transition began centuries before the modern battleship.

There was no single cutoff, but the method became progressively less practical as ships grew heavier and adopted iron hulls. Henry VII's investment in a large Portsmouth dry dock shows that even early large warships benefited from purpose-built maintenance infrastructure. Once a hull was liable simply to settle deeply into the shore, beaching ceased to be a useful solution.