What are the disadvantages of using the syntax || = to perform memoization

Question

I noticed that some people comment on how their use ||= to perform memoization was "sloppy", but they did it anyway "because they were in a hurry."

I also found ActiveSupport :: Memoizable .

I came to the conclusion that ||= has flaws.

And what are they?

Answer 1

Well, the biggest reason I know about is because you cannot memoize nil or false values ​​like this.

Answer 2

I suggest reading this:
When to use memoization in Ruby on Rails

And this:
http://www.railway.at/articles/2008/09/20/a-guide-to-memoization/