Pretty slick! I wish we had this a long time ago. At the time, our testing infrastructure was a bunch of very flaky Selenium tests that we would run on through SauceLabs. The tests were super slow, mainly because we tried to reduce flakiness by buffering clicks/interactions with sleep() commands. All around, a painful experience which developers hated, which meant engineers did everything they could to avoid adding/modifying tests. It was the worst vicious cycle.

Biggest concern I would have is portability. One benefit of testing suites, when done right, is they gain more coverage over time, especially against regression bugs. I would be very concerned about building up a large suite of tests for my most critical flows on proprietary tech that could be rendered worthless in an instant if the company goes bust, decides to pivot, etc.