I'm not sure about that point though.
Dragon Quest XI S received a subtitle to highlight that it's an enhanced version with a lot of additional content that separates it from the original 2017 game in a substantial way.
I din't ignore it, but let's be aware that at one point we didn't know what either Royal or now this thing were going to be. R could've been the enhanced edition for PlayStation systems and S for Switch, scheduled to release after R and thus the name change. Who knows. On top of that, people also were ignorant of what you say or simply short sighted: Persona 5 S, ok Dragon Quest XI S exists, therefore P5S is the Switch version! That's exactly what I saw.