One time I was really hyped about so-called "molecular surgery"[0] - a technique which promised forming cartilage tissue - so the septum, tendons or even the cornea - with little effort and, crucially, no heating. The research looked as it was in an advanced stage with demonstrations on live specimens and whatnot.

Never heard about it again.

[0] https://www.sciencefocus.com/news/molecular-surgery-gives-pa...