Negotiate Fridays off in lieu of a raise

I know this isn't available to everyone, but please let me open your Overton window to the idea of asking for one day off a week in lieu of a raise. I'm not talking about cramming 40 hours into 4 days, just... Fridays off. After 8 years at my company I negotiated this, and it's been life giving/changing/affirming. I've met up with friends, garden, read, knit and spent the day cooking for a dinner party. I plan on solo trips to the pool and the beach this summer. I plan to grab a coffee and hit a morning movie. I've volunteered at my kids school. And no surprise to anyone... the work still gets done in 4 days.