That's "solved" in the way that viruses "solved" life; I think we might want higher standards than that.

Un/fortunately (depending on who you ask), there's also a lot of automation being developed for every stage of the industrial processes from "where do we even look for the right rocks to get out of the ground?" to "here's the RAM chip you wanted to stick in your socket".

My point is, it's irrelevant. Yes we can't replicate the process of cell replication but in this case it isn't necessary. We can achieve the end objective (which is to repair/extend) through other means, this is akin to just replacing organs with factory build versions (memories pre-installed too).