My Fein does as well, but I don’t use it. First reason is stuff escapes the dust boot occasionally and needs to be vacuumed up by hand, don’t really want to run the spindle just to vacuum, and it isn’t any more convenient to go switch modes on the vacuum than to turn it on/off by hand. Second reason is I power everything except my vacuum from a power supply with battery backup, so it just won’t work for me. Flipping one switch to make two switches imho is more of a novelty than anything else, unless your vacuum is just really hard to reach, like in a sound deadening box or something.
Dan