Shipping a compiler every six weeks
The author is a bit inaccurate, depending on how you count things. At Microsoft we ship the C#, F#, and CB compilers on a cadence faster than 6 weeks; probably every 2 weeks on average. New language features don’t make it in to each of these releases, but bug fixes and performance improvements certainly do. These releases are kore driven by tooling evolution (VS updates, .NET SDK updates) than language evolution though.