I think related technologies have been introduced a few times over the years. I remember seeing a similar system on an American pickup truck at least a decade ago, and I think Cadillac or someone tried it as well.

As I recall, they’ve always tended to fail because drivers don’t know how to use them. They require learning a new skill and a new way of thinking. An actual self driving vehicle might be able to make more use of the added maneuverability, but people who have been driving for decades (who are the primary market for cars in the price range these run in) have developed a muscle memory such that driving is automatic. Learning to use four wheel steering isn’t just picking up a new skill - it’s actively having to unlearn a fairly complex process that is literally hardwired into your brain at that point.

People who parallel park already know how to do so, and higher end cars can park themselves. Roads are designed for traditionally steered cars (eg for things like the turning radius) so I’m not seeing a benefit there either.

I could see this being useful in something like a forklift, where you do have to be concerned about limited spaces, but there it would be explicitly taught as a new skill which your brain could separate from car driving because it’s a different vehicle with a different application and environment. You wouldn’t have to unlearn anything.