Takes time and the older we get possiblty the longer the recovery periods. As long as it is going uphill I would not be concerned. When science discovers how to stop the existing and renewed individual cells from changing some of their qualities with age. Lifespan may be increased for man. It may be as simple that as we age we do not replace cells as often now..

It almost looks like cells form barriers on their outsides or they get a reduced absorption ability. This changing many things. For example as we age the cells cannot produce as much heat. Indicating that they can no longer absorb the nutrients at the same rate as when we are younger. Obviouisly the same effect will impact healing to some degree.

It is sometimes a little hard to look at the bright side for all of us. You have not had any complications. That is something to really appreciate. They are not rampant in the medical field but they still are all too common.