I live on a sailboat in the Treasure Coast of Florida (for now anyway). WE are at sea level in the Indian River, a river that is tidal, though not much of a tide here. It varies about 1ft from low to high most days. So, we either have to step onto the boat from the fixed dock, or, step down. When the winds blow hard off the ocean, we might have to step up. The docks have been here and haven’t changed in 20+ years (we’ve only been here a few years), but, nothing has changed around here.
It’s a sad remanent of what William Mulholland did to the Owens River valley, when he rerouted all the water he could to make Los Angeles the place it is now.
In a finite Universe (at least one with a beginning) SOMEONE has to be the first. So far, we are the only ones we know of, so, unless someone actually does show up, we’re it for now.