So from the other side of the coin.
DH: was a contractor and travelling the world when we met, he gave that job up to relocate to where I lived and took a 50% pay cut.
8 years later, he's back on the pay he was on when we met, slightly different career, same prospects. So his stalled.
Trajectory wise: by the time we are in our 50s we will be earning the same roughly, providing our plans work out. I have more scope for quick promotions and pay increases, his job will always be considered more "difficult" and "professional" to outsiders. To us, they are equal. We both have exactly the same priorities, same degree of flexibility and both take hits when we need to in terms of days off for sick kids.
So in our house, totally even, even if currently he earns more than I do.
And when it came to making the decision for my staying at home, I already was a SAHM when we met, so not only did he take the bigger career hit and financial hit, he also had to financially support me and our daughter (who obviously biologically his)