There's nothing wrong with using if let strongSelf = self or guard let strongSelf = self. However, strongSelf makes the code a bit more cumbersome to read.

strongSelf or any other name different from self used to be required when we couldn't use that keyword in an assignment within a closure, but we now can and do so in various places, e.g.

We should remove the leftover instances of this old pattern and keep the codebase homogeneous.

Update, we can actually use an even better syntax:

if let self {
  ...
}

I renamed the issue accordingly to include acting on both strongSelf = self and self = self.