How is this different than say bubblewrap and others?

https://jai.scs.stanford.edu/comparison.html#jai-vs-bubblewr...

> bubblewrap is more flexible and works without root. jai is more opinionated and requires far less ceremony for the common case. The 15-flag bwrap invocation that turns into a wrapper script is exactly the friction jai is designed to remove.

Plus some other comparisons, check the page