I'll list a summary of what I currently know and think about it:

Pros

• Shorter, more concise code
• Possibly a slight performance increase
• Precision-preserving, because less arithmetic is needed to calculate it, and thus less rounding-errors
• Increased likelihood of devs recognizing the methods because of their names

Cons

• Slightly "pollutes" the Math namespace because the methods are easily replaceable
• More names to remember
• Less likelihood to be approved by the comitee, because they're too specialized and defined in terms of another method that's currently a proposal

I think I'm wrong about at least 1 of these, please let me know any mistakes.
I'll add more to both lists if I get requests to do so

from proposal-math-extensions.

Petition to add variadic relative normalization:

Math.normRelative = (...values) => {
	const min = Math.min(...values)
	const max = Math.max(...values)
	return values.map(
		x => (x - min) * 2 / (max - min) - 1
	)
}

This scales each value to the range [-1,+1], from a range relative to the minimum and maximum values themselves.

I'm aware that a Math.* method returning an Array is controversial, since every method should return a Number

from proposal-math-extensions.