I know people who have managed it successfully. However, I would strongly that it only ever becomes less bad or manageable...best case scenario.
Even the project leads, principals, partners I know who technically have "made it" in terms of work-life balance, still work 70 hours a week. What they've really managed to do is life with the new life demands.
So, yes, you "accept" your lack or work-life balance more. You probably learn to push back a bit more, take the breaks where needed, etc. However, you still never have a "normal" work-life balance and the stress/demands of clients with always be front and center!