Roombas do not get.....
I'm sure we're all in agreement on that. The two areas in the chapel that I feel generally have the most need but get the least amount of love, are the pews themselves with the crumbs and such, and the carpet underneath the pews. I've found that the under-pew area cleaning varies widely from place to place, and ideally a robot vacuum could address that -- but obviously could not clean the actual pew, or steps to the stand, or unique features of a particular chapel. So it's definitely a supplemental option, with manual labor still required for all these additional items needing cleaning.