I do not believe in alimony or palimony (adult support - I was using alimony as a catch-all phrase - didn't think I would have to explain that) except in extreme circumstances. The loss of lifestyle argument does not resonate with me, particularly between millionaires.
Your site link says nothing that differs substantially with my opinion of spousal support (historically or current day). One millionaire doesn't need spousal support from another millionaire.
This is likely a temporary settlement issued by the court while the divorce proceedings take place, which means discovery, (aka proving anything) has likely not taken place.
My argument has always been - both parents should take care of any children resulting from their relationship to best of their abilities. No children - divide assets produced during marriage - no adult support payments. Child support (tax-free) can include housing & other expenses to facilitate child rearing, which also provides benefit to the custodial parent and can extend beyond age 18 in some cases. Alimony can be eliminated before a child is of legal age and can be taxed. A good tax attorney would tell any custodial parent to take child support instead of alimony.