Not so much:
From Steam:
"Notice: This product is not compatible with macOS 10.15 Catalina. Click here for more information."
Thus, after three years of waiting, we're *still* waiting for actual answers about transitioning (eventually, some time next year) to the new system...after we transition to the temporary system, and *then* to the new system.
No word on any support for anyone beyond the Windows crowd. No word on what's going to happen when either of the transition steps cause people to lose access to their Island and have to restart (which happens too often as it is :/ ).
That means still not spending any money on anything until we have useful answers and a better plan. :/