> The main question to these type of assertions, what's the alternative? > There are natural patterns You just named the alternative. We don't see people say

> The main question to these type of assertions, what's the alternative? > There are natural patterns You just named the alternative. We don't see people say "Singletons or GTFO!", we have a toolbox that we apply to problems as needed. "Best" practice implies there is one and only one "correct" way to do things. "Good practice" would be a better term.