Has the new Tab model been released in 0.50?

Discussion
1

In the change log of the 0.50, there is a new tab model in this version.

I am already in the 0.50, but don’t know whether the new Tab model is released or not. How can we identify the tab model been used?

Is it possible to add some model version info in the cursor tab output log?

2

Supposedly it was released even earlier, some 0.49 version. It can do multi file.

Did not try / observe yet.