I could understand wanting to change jobs, not all "coding" jobs are high stress. But if they have no kids and they have considerably different ideas about their lifestyles, maybe they don't need to be married.
Seems like a bit of nonsense though, I don't know anywhere where they will be able to live and support the luxuries she wants on 100k a year unless they are living paycheck to paycheck, no savings, no retirement, no paying off the mortgage.
But this dude needs to file before she quits her job, if they make the same money there should be no alimony. If she quits first, he's screwed.