I chose the languages used in the comparison with that in mind. Moving from GA to e.g. Matomo or Plausible does not require to completely reshape the way you th

I chose the languages used in the comparison with that in mind. Moving from GA to e.g. Matomo or Plausible does not require to completely reshape the way you think about your problems, you don't have to change the way you work, you just have to learn how your new tool implements it. (Also Haskell to Rust is pretty straightforward, the typesystem knowledge you learn in Haskell usually means the harder parts of learning rust are made easy. Having done that transition, 1 month is reasonable to be productive in Rust)