I would put it in the same class as lathes or mills you probably aren’t saving money by buying one but it may open more avenues for you.

I will say though with the price of printers vs mills & etc, a cheap printer will get you much closer to breaking even. You might save more than you spend if you can use an Ender 3 judicially but overall it’s mostly for those odd projects or when a custom part is needed.