One example is HTTP libraries. For instance, take Mint (https://github.com/elixir-mint/mint https://github.com/elixir-mint/mint): > Mint is different from mos

One example is HTTP libraries. For instance, take Mint (https://github.com/elixir-mint/mint https://github.com/elixir-mint/mint): > Mint is different from most Erlang and Elixir HTTP clients because it provides a process-less architecture. Mint is a low-level library which doesn't make attempt to manage processes (including HTTP pooling). In contrast, Finch (which builds on top of Mint) includes pool management: https://github.com/elixir-mint/mint#connection-management-and-pooling https://github.com/elixir-mint/mint#connection-management-an... It can take someone a bit off guard when they realise that the library they use provide a "default pool" they were not aware of, and that it can become a bottleneck etc.