One thing I notice in every thread about 5 strings, it seems like folks only focus on the extra low notes you get, and pretty much ignore the fact that the frets on the low B go all the way up. So what? Well, sometimes I like to shift my pattern up by 5 frets, to get a different tone, get the frets a little closer together, reduce reach to the “1st” fret etc. In other words, play the 5th fret like it’s a zero fret. Voila, the B string is now E, etc. Admittedly you don’t usually have to _fret_ an open string, but from a mental map perspective it works. Try it. You’re welcome.
Yeah, my left hand would agree with that. Playing that bottom E on the fifth fret of the B string opens up a host of new options. And that's just for starters... and, of course, my right hand's cool with it too.