My son is a full time, employed dev who negotiated working 30 hours a week so gets full benefits. He sticks to it. Seems everyone accepts he won’t put in additional hours. Has time to pursue other things.
I’m part of Daniel Vassallo’s Small Bets community. Majority are devs who quit or plan to quit and generate income in tons of different ways (digital products, micro-SaaS, real estate, freelancing, e-commerce, content marketing, domain flipping, YouTube…). Might be worth checking out