I am working in an American company for 17.5 years, most from home (12 years) with occasional visits to the local branch office (Europe) and sometimes to the he

I am working in an American company for 17.5 years, most from home (12 years) with occasional visits to the local branch office (Europe) and sometimes to the headquarter in US. I work on different time zones as needed and it gives me some flexibility, but longer hours to make up for it. It works for me, but for each case where it worked I have another 5 where it was so and so and probably 10 where it was bad for the employee. This is because people tend to work longer hours, lose connection with the team (they are not in the office at the same time), it is harder to find someone when you need them because they work different hours that change a lot. Flexible working has advantages, but it also has disadvantages and trust is not part of the equation most of the time, presence, interactivity and coordination, human connections that are created face to face, these are much more important.