Can't edit my last post in here anymore.
Here's the above paper in its entirety:
https://europepmc.org/articles/PMC5314152
It seems like they are taking it seriously lately or, at least, accepting that today's technology make a way for it possible.
Latest advances are getting us near a time where Limb Lengtening will be easier. Directions are 2.
The first direction is the closest one, and it is when side effects of Limb Lengthening can be undone (cartilage regeneration, tendon healing/regeneration, better infection and pain management, chronic pain cure and bone regeneration for fast recovery and avoiding non union). This is the most likely, and we are seeing it close right now. Many people who had complications here could alleviate them thanks to these advances, althought we use to take them for granted. Veteran LLers will someday get to 100% recovery once these stuff will start to get to the clinics, and there are news and advances about it every week.
The second one is Tissue Engineering for bone elongation. This one can be done by modifying the actual cells of your bones or by implanting a small secion of bone from your cells that, once implanted, will grow by itself (Epibone will start clinical trials in few years).
By the way, the stem cells industry is optimizing procedures to make them cheaper, we have to take into account that the demand is giant, so companies will fight fiercely to make the prices down and get pattients to consume their therapies.
Also, we have to remember that not so long ago, internals were something that most of us didn't consider, it was like a new technology and externals were the norm. Now internals are the norm, and they have been improving dramatically, and 2018 has been a good year full of advances, and new companies (Synoste) are entering the market, that makes 3 companies, and it will make the prices go down due to competence.
Automating the process to make these implants will make the prices down too. We have to remember that it is a relatively new technology and it is still going to be more optimized than now.
As we say in Spain: poco a poco. We are getting there. The first step is bone regeneration (no more age limitation) and cartilage, tendon, chronic pain cure and nerve regeneration. Once we are there, only the temporary pain will be the biggest deal for us, and we are going to break those limits that we see today when it comes to amount lengthened.
Remember: we are talking about a major surgery needed by many people around the world not just for cosmetic purposes.