Last I was aware, there's no real data looking decades later at cosmetic leg lengthening patients and whether or not they have developed joint problems, arthritis, etc.
What's true is that any surgery has a risk of complications and you have to consider the risk vs reward for you personally.
He talks about pain,infection and amputations but :
He probably did externals and depending on the segment it probably have been really hard .
Also ,the risks he mentioned are real and we know but with a good surgeons (not even a good one just a regular ok surgeon)..infection that requires amputations seems really beyond my imagination .
Maybe in india with a bad doctor .
Pain and difficulty are also things we already know .
Only new thing is the long term problem he mentioned but it's the first time I see such a thing after the post of many years ago about this guy s apparent convo with a doctor who said same things to him .
The doctor was not mentioned in that topic .
So idk but knowing who said this/mehod/doctor would be helpfull