I think the underlying question is, "Can Pleione be observed with the naked eye today?" > And I've never, in decades of observing under many different conditio

I think the underlying question is, "Can Pleione be observed with the naked eye today?" > And I've never, in decades of observing under many different conditions from different latitudes, ever seen seven stars. This really only tells us about you. Even if your vision is 20/20, your experience doesn't preclude the possibility of someone else discerning Pleione. And if they can, that ability can definitely be determined by time of year; which affects not only where the Pleiades are in the sky (e.g. how much air mass you're looking through), but also things like turbulence and humidity.