Idea: Proform select field as (AJax) search

Imagine a select field that is presented as a search field. This could have many applications.

Instead of scrolling down a long list to find the option you want to select your just type in the search field and only relevant options are presented for out to select.

A use case could be postal codes, countries, or in general where the selectable options are to many.

This and the other idea I submitted about populating the select fields using csv. complement each other.

What do you think about this idea?