I also play solo and have never used the soloist feature, because like you I play my own solos. However as anyone who does solo gigs will attest to having the same instrument solo on every tune for a gig lasting over one hour can become be a bit cumbersome and even repetitious. So in the past (before RT Horns, Harmonicas, Fiddles etc) I would shy away from gigs lasting over an hour, hour and a half. But since the addition of RT's I have no problems with booking and playing gigs as long as 3-4 hours. I may even do some tunes without a guitar solo at all, but most of my play-list include me soloing along with a few of the RT. I.e., me on guitar from bar 32-52, trumpet from 52-71 etc. The RT's not only take some pressure of off the one person performance but they also add spice to the gig.

Not sure if this answered your question but I hope it helped.

Later,