Devine’s Upgraders, Part 6: Were the Lloydminster and Regina upgraders enormous money losers, or huge successes? The conclusion

For all the political strife over cost overruns of the two projects as they were built, and their initial struggles, the added provincial royalties in the 21st century made up for that in spades. And the further investment in northwest Saskatchewan’s heavy oil patch has far outstripped the money spent on the Bi-Provincial Upgrader, even when you adjust for inflation.
That, unequivocally, proves the investment in the upgraders was sound, and visionary. It just took a while to get there.