That's not the original meaning of a "lifestyle business" anyways, which is more like a business that makes enough (to its owners, nothing to do with the employees) for them to maintain their desired lifestyle, like maybe a few million in revenue or whatever, but can't / won't be scaled beyond that because their lifestyle is already well supported by the current business growth / volume / revenue so they have no interest on blitzscaling, taking VC money, and running the perpetual growth treadmill or because the business is already topped-up and won't support further scaling (its not always a choice)

I guess if you have nothing else to live for except your job, you'd be really psyched to keep dumping more hours into it...