This is honestly my own biggest dream ever since I started my unexpected journey of struggling with my height. This is also the only real way that we can conquer the unjust inequality of human heights and the millions of struggling men and women out there. I am somewhat confident that humanity at one point WILL find out how to restart growth in grown humans, with the advancements of science, computing power and technology, be it using transforming human tissue into growth plate tissue, successfully inserting artificially grown limbs, stem cell technology, nanobots or whatever possibility there is out there. It's very possible that we will only see these advancement in a couple of hundred years, but that doesn't stop me from hoping that the achievements will come until the end of my life. It's also why I have huge respect and admiration for the field of medicine, science and engineerging, even though I'm not a STEM person myself. But let's hope some very smart nerds will figure something out one day.
There is certainly a huge market for it, anyway. Millions of men would pay a lot of money to get taller, I'm sure. It's a possible billion dollar market, so the economic incentive would be there.