So it couldn't go any further than animal testing, and things like clinical trials weren't possible. Well the reasons for this were pretty mundane.

Ethical issues, yadda yadda yadda... all sorts of bothersome regulations.

It takes a lot of time to find people eligible for complete organ reconstruction...

That said, it's common for research to not progress as far as you want.

The people around him didn't think it was worth making a fuss about......