When did neutral at the light switch become standard practice?

[Kidsolo]

I am trying to find out when it became standard practice to run neutral to light switches.

Electricians started running active, neutral and earth to the switches when Plate switches became popular. Before that we used architrave switches and you cant fit all those wires behind the architrave. It is easier to only run a single cable to the light fitting when you are usually working off a ladder when connecting it.
It is all a matter of preference and what suits the job.