I'm happy for you but this is a super privileged viewpoint that most people can't really learn from. I'd be happy too if I could just take a year off and do whatever I want. Most people can't do things like traveling to different cities and trying out a new place for 3 months. It's just unrealistic and only reflects and incredibly tiny population.
More importantly: has it really been the best thing you've done for your career? It sounds like you've had a great time but we don't know how this materially affected your career.
What about your sabbatical has made your career better now that you've done it? All I've seen is that you've open sourced a Hugo theme, read a few books, and you worked on a side project. Sounds like something plenty of people do with 40 hour workweeks.
More importantly: has it really been the best thing you've done for your career? It sounds like you've had a great time but we don't know how this materially affected your career.
What about your sabbatical has made your career better now that you've done it? All I've seen is that you've open sourced a Hugo theme, read a few books, and you worked on a side project. Sounds like something plenty of people do with 40 hour workweeks.