Hola,
I’m a native Spanish speaker from Spain (I live in the U.S., spoke English all my life with a native English speaking father and my English could be better than my Spanish). Since I am Spanish, we use vosotros. While I heard people in the U.S. learn “ustedes comen”, I would say “vosotros coméis”.
I’m in my 40’s, but I still remember my middle-school Spanish lessons: soy, eres, es, somos, sois, son. Of course, we were informed that the ‘vosotros’ form was particular to Spain.