What models use "HP-48 style" enter?

[Orome]

Many sources say that the ENTER behavior introduced with the 48 (the key does not push the stack) is "used by later HP calculators", but this (ambiguous) statement isn't quite right: it's used by some later HP calculators (e.g., it's not used in the 35s).

What models use this behavior? Is there a rationale for it (or for introducing it and then not using it in some later models)? Are there any options to enable or disable it on any models (e.g., as on PCalc)?