The alternative is dialysis, which isn't a good patient experience at all. And this is an experimental procedure, testing an early version of the xenotransplant technology. A bad long term outcome would be "the organ ends up rejected within two weeks, and does some damage to the patient while at it".

In a perfect world, this tech would work first try, and the xenotransplant would last for decades. We don't live in a perfect world.

If this proves a workable stopgap, bridging the wait time for the people waiting for donor organs, extending lives of those who don't qualify for organ donations? It might be worth using on those grounds alone. And it's likely that organ longevity could be improved iteratively.

I.e. use an organ to failure, figure out what went wrong and what the host immune system has reacted to, find a way to gene edit around that, get another 6 months of transplant longevity in the next version. Rinse and repeat.

Yes, we don't know what the true limits are - "universal and permanent organ replacement" is very much on the table with this tech. But it's pretty clear: getting all the way there wouldn't be quick or easy. A year of organ lifetime is a damn good start.