> Fragmentation is an issue with every mature, vibrant ecosystem. It's also a benefit in that it fosters innovation. I get your point, but sometimes it can be

> Fragmentation is an issue with every mature, vibrant ecosystem. It's also a benefit in that it fosters innovation. I get your point, but sometimes it can be better to have a somewhat less-than-optimal solution standardized rather than many "better" solutions. And while people obviously come up with different solutions to the same issue, it is important to distinguish critical systems (eg, error handling) from other systems which are specific to a few domains (eg, webservers). IMHO, the former absolutely need to be standardized. > As for lens libraries? Edward Kmett's library[0] has taken over that space. The other libraries represent previous attempts at discovering the optimal API and mainly exist now for historical/compatibility reasons. I get your point, but I'm sure you'll still find a number of libraries on Hackage depending on non-Lens packages. This is not a desirable state of affairs.