Comment by II2II

Wouldn't it depend upon context?

If it is an emergency, it is a voice call. It is both immediate and conveys urgency. If it is something that you need to talk through, it is a scheduled voice call. Asynchronous communications may demonstrate respect for a person's time since it does not (need to) interrupt them in the moment, but the inefficiency results in a disrespectful waste of time for bidirectional conversations.

If it is something where you need a simple response by the end of the day, it is a text. If it requires a lengthy response, email. Never expect a lengthy response by the end of the day, or for it to be handled on devices with terrible input methods (like phones).

Anything that isn't covered by those scenarios will be largely dependent on the person.