System.UserId identifier (PK) is using int32, will it get an upgrade soon to int64?

wSystem.UserId identifier (PK) is using int32, would this get an upgrade to int64 (long int)?

You want to have more than 4 billion users? Going for world domination? :)
Hey Robert,

At the moment, there are no plans to change that identifier. What is your use case?

Thank you,