If planapple.com were HSTS preloaded, then newer releases of browsers would know to connect to it using only HTTPS, even if the browser has never visited planapple.com before.

Not only would this make planapple.com more secure, but even the preparation for HSTS preloading also involves implementing better security practices, so overall, HSTS preloading is a good thing.

Please submit planapple.com for HSTS preloading here:
https://hstspreload.org/?domain=planapple.com