Would you retire early/Can retirement be boring?

I recently read an article about retiring early. The formula seems to be, live drastically below your means for around 10 years and invest, save, and invest some more. After a tough decade or so, you can retire early. Do you all think it’s worth it? Would you go through that for 10 or so years to retire early? Is it better to just live life instead?

Also, for those who are retired, does it get boring? I know lots of people complain about their jobs, but after while is all that freedom too much? I know a lot of retired people do hobbies or finally do what they love, but should we instead try to do what we love even when being young?