Because I’m just an old guy who took up woodworking after retirement doing the best I can. I had no idea what you were talking about so I had to look it up. I can certainly see where stave coring would make for a more stable door, but also requires a lot more machining, glueing, resawing and veneering, but I’m not really set up for all that. These are the only doors I ever expect to make. The house I’m replacing is 100 years old and has solid wood doors which have held up well, although they do have a mortise and tenon joints.Curious as to why you chose solid stock over stave coring your stiles and rails?
I hope racking doesn’t become a problem. Time will tell. The openings are standard size so the doors can be replaced if they fail. With the six panel doors, about 25 of the 80 inch height is glued 1/2 inch deep cope and stick joints so I’m hoping the doors hold up.