These slides simply assume that Haskell as-is is progress, and then bemoan the "fashions, whims, and tastes" of the industry in being slow to relise that. But t

These slides simply assume that Haskell as-is is progress, and then bemoan the "fashions, whims, and tastes" of the industry in being slow to relise that. But to measure the "timescale of progress" you need to consider the duration not from the time an idea first appears until mass adoption, but from the time the idea is proven and market-ready. GCs were widely adopted within 5 seconds of them having acceptable performance and not being packaged in runtimes with other significant downsides. The adoption rate of technology -- in general and in software in particular -- is largely consistent with what we'd expect from traits in selective environments. Ideas that trickle slowly through fashions (genetic drift?) are those that aren't adaptive (yet?).