I did see someone suggest that maybe R-T v7 should ship with a component that implements the v6 API on top of the v7 implementation, but that would add a noticeable amount of overhead to the API and I'm not sure how much benefit there would be.
I've toyed with that idea for a long time now. I go back and forth, but as of today, I don't feel like that would do much good with the success I've seen people having with the examples. Sure, v6 was popular because it was very AG-grid like and included everything you could ever want and just dropped right in. But IMO, that led to most of its long-term and difficult problems, mainly issues around "How do I style this", "How can I rearrange this", "How can I extend it to do this". I find it much easier to show people how to make their own table component in an 80 line example, then extend it in userland to fit their needs.