Does it still make sense to use geo sitemaps?

This is something I used to always do, however in recent times I have not and it doesn't seem to really matter. There is no considerable difference between sites that don't use them and sites that do. That being said, is there something I'm missing here? Is the geo sitemap a quintessential piece of good SEO that should never be passed over or is what I'm noticing a reflection of the true nature or geo sitemaps?