On Tue, 24 Jan 2017, Dominic Steinitz wrote:
2. Most people do *not* use it. I believe https://hackage.haskell.org/package/mwc-random is a popular choice but developers are free to use e.g. Mersenne Twister, PCG (Permuted Congruential Generator), TF (ThreeFish) and many others.
I have used the plain old System.Random exclusively for years now and did not encounter any problems, but I also did not watch for them. I used System.Random for Markov chains, audio noise generation, randomized algorithmic music, board game computer opponents etc. I'd like to keep a default random generator for the many cases where I don't care about the precise algorithm. That said, I got used to some randomized synthesized sounds and randomized melodies such that I already noticed changes in the random generator implementation.