The problem is there will be shuttle hanger's on just like there were Saturn 5 hangers on...
Heck you could probably still find people who think the Saturn 5 was such wonderful technology that it should be rebuilt exactly as it was (with minor upgrades of course).
We really won't lose anything worth keeping by moving on to a new technology...unless you believe that we will forget how we did things back in the "good ol shuttle days"...In which case, how we "gotter done" is probably best forgotten.