United, like Delta and American, has probably hired all of its Widebody Captains for the next 25 years.
Without WB CA that in the picture it really should be a consideration for Widebody FO and Narrowbody Captain opportunities and QOL for which United lags both DAL and AA when junior in those positions. Anyone approaching 40 and applying to UAL should take this into account and probably rank UAL 3rd behind DAL and AA unless they live in a United base where the other two don’t have a presence.