It's wonderful that the Spring Hill roses have survived so long for you. I have to say, my original roses survived despite me, I had not a clue about rose care when I first started growing them.
Last spring I got adventurous, and ordered 3 own root rose. 2 of them were David Austin's, ( I didn't know that then) I got Falstaff and William Shakespeare. Now that I know I have these treasures, I'll have to take better care of them from now on๐