A 56-year-old man with liver failure has become the first living person to be surgically connected to a genetically modified pig liver, say the team that conducted the surgery. The pig organ filtered the man’s blood for a few days while he waited for a human liver transplant, they say.
All major organs do have a “skeleton”, however that itself can be immunogenic and there are still issues with differentiation of the stem cells into the correct proportion and locations. If people wanted scientific advances faster we’d put a lot more money in.
Banking of tissues is unlikely to occur at scale without cheaper and more reliable refridgeration. Ultra low temp freezers are not cheap to run and reliability is costly.
You can’t freeze tissues and reuse them.