After long years of experience (20+ years) you reach senior levels where mutually-exclusive work-life balance doesn't work anymore, and you have to learn work-life integration.
At that point, for senior people, work and leisure become one and the same, and there's no difference between work time & free time, night or day. You are available for work tasks around the clock as needed, and learn to plan and enjoy your leisure activities in between and around work.
Let me give you a couple of examples:
Need to go for a foreign work trip around the time of your anniversary? Take your spouse on the trip with you, and celebrate the anniversary during the weekend abroad.
Want to check out a famous restaurant, and also meet a friend while on a work trip to another city? Schedule a lunch meeting with a client at that restaurant, and later meet your friend for a dinner in the lounge of the hotel where you're staying, in between your calls from your hotel room.
Want time for exercise and sports? Schedule a golf game with co-workers as a team-building exercise, or a one-to-one meeting with an important client over a golf game.
And etc. etc., hope you got the idea. So 24x7 work mode is not necessarily as dreary as it sounds 😄