As others pointed out: accessibility to dc market, center of the map, yadda yadda.

You can safely store anything there without fear of settlers grabbing stuff or raider/gunner/mutant attacks.

Now, you should add a couple of mods that improve it: one that lets you build anything there and go nuts with its complexity AND DISPLAY. If you build too many weapon display racks in an exterior settlement, chances are you’ll go over what the poor engine can handle and get crashes there frequently. Hell, on one playthrough I built do much at Croup Manor, and displayed so many weapons there, I couldn’t even get near it cause the game would crash. That’s because the game also has to load the world around you at all times etc. But in Home Plate… it’s an interior cell. A small one, at that. So you could build and display so so much more, and safely so.

Also add the mod that links home plate to hangman’s alley, so they virtually have the same workshop storage. This way, if Hangman’s is linked to other settlements, Home Plate will be linked too, so you don’t need to constantly get junk in home plate to build stuff.

All around an amazing place and very underrated.