You’re going to hate me for this, but GS CPUs trump 1K RPUs, unless the RPU happens to clear in advance.

Even ignoring that, your analysis is wildly optimistic, because you’re assuming that all of those RPUs are actually getting used. Read the threads about how few of them clear. The reason isn’t that somebody else gobbled up the RPU space. The reason, in most cases, is that they’re able to sell those seats. On popular flights, like the p.s. flights, they’re often selling every single business class seat.

Sure, you might be able to upgrade the occasional BOI-LAX flight on an E175 — a flight that you might have cleared with a CPU anyway. But, overall, the premise is just flawed.