[jasonwelk]

I can't speak for Microsoft itself, but wouldn't the effort to implement a production-ready time-traveling debugging system (as explained here by SteveJS) be at least somewhat influenced by the growing popularity of time-travel debugging in other languages?

[zokier]

What other languages got timetravel first? The biggest I've heard is rr from 2014, which is for native code or basically C/C++.

[jasonwelk]

One language that has popularized it in very recent years is Elm. It's mentioned everywhere.