I have worked with 50% remote people for decades. There are all sorts of ways this can be productive. The most obvious, which may or may not appeal to the majority of HN’s demographic, is people with families.
If you’re 50% WFH, you can structure your parental life around the remote days. It’s not that you work less on those days, but the time you would otherwise spend commuting is time you can spend on weekday family things.
Another scenario I’ve seen is people who want a "remote home.” Fed up with the prices for living in a major metropolitan area, or perhaps because they prefer a smaller town and/or living in a rural area, they buy a place with double their usual commute.
That can be brutal, but if you only do that a couple of days of the week, and can structure your F2F work on those days, the total number of hours commuting isn’t so bad.