Unless I am grossly mistaken, if it is indeed a terminal spike then, yes, it will be a situation similar to that of a phal with a terminal spike. Because these are both monopodal orchids, the stem has only the one growing point -- an apical meristem. If that tissue has changed from vegetative tissue to reproductive tissue, then it will no longer be able to continue vegetative growth from that area. However, a new vegetative growth point can develop somewhere else along the plant's stem. That new 'branch', once it forms its own roots can be removed as a keiki if one wishes or just left to grow alongside the old main stem.