How else can you get a numeric value from 'this' (besides Number(this))?

Besides Number(this), the numeric value from the object this can be obtained using the unary plus:

let num = +this;

You can also use the parseInt or parseFloat methods if this is a string, for example:

let num = parseInt(this, 10);

Or call the valueOf method if it returns a number:

let num = this.valueOf();

The unary plus is the shortest and most common way to convert to a number.