Childrens bed

anyone else completely skip the Twin size mattresses and go straight to a full ? we plan on doing a floor bed anyways like one of these pics (thankfully my husband can build it himself lol that price is crazy), but i honestly don’t see the point in getting a twin mattress when kids grow so fast and i mean who doesn’t want extra room to sleep lol. my daughter is almost 2 so we’re pretty much done with the crib for rn !