If you can be competitive with peers and get enough done to continue progressing in your career with every Friday off, why not? The limit for me has always been

If you can be competitive with peers and get enough done to continue progressing in your career with every Friday off, why not? The limit for me has always been my own productivity (and availability for meetings), and I think at a certain role level it's a reasonable expectation that you be measured in outcomes and not time spent at desk.