The Glocks have very different frames in 40/45, the Rugers will not. The P91 w 180/40 HS was a softer shooter than the P90 w 230/45 HS.
Wonder what has taken them so long?
Wonder if it's cuzz Ruger doesn't get as many LE contracts, so the 40 could wait, since they sell way more 9/45s. Same reason they dropped the P91?