Maybe.
My point is that these firsts are still true to the franchise and are not lesser because of being first.
The poo-pooing attitude of firsts is frustrating. Why not eliminate the Cage all together? No reason to reference Pike at all.
I think you might be misinterpreting, we still love these things. The Cage is awesome. And being first doesn't make it lesser. But there's no need to throw the baby out with the bathwater.
Being first just means that, when talking about what's overall true about a character, the rough notes are skipped because the character has often immediately moved past that.
It's a footnote instead of a defining note. The Cage has some amazing defining notes to mine. The footnotes are mostly fun trivia points.
We can adapt a new version of Wolverine where his claws are attached to his gloves since that's what came first. But we won't, even if we appreciate the moment for what it was.