Would you take fewer vacation days in favor of a 4 day week?

As a Sales Executive nowadays you are always working, so it doesn't matter!

The idea that we need 40 hours at all when reshaping our personal commitment to our employer for time is arbitrary. Originally (for the sake of population growth & mechanization), it was suggested that by shortening the work week to 4 from 5 days, we'd have a better system. But, I think working 32 instead of 40 hours over 4 days is more than enough for most people in a work week. And, if we fall behind, the present-day guilt and family displacement would be trivial as we work an extra hour or two (like we already do on occasion) on a day where we fall behind or have last-minute work.

I experimented with a 4-day work week-like schedule, and for sure my productivity increased. Friday was not off; it was working from home without any meetings :). The flexibility in time was helpful to finish some chores like groceries and laundry. My Sat and Sun were thus free to engage in things like dancing, photography, hiking and working out. Taking a long vacation, on the other hand, was not such a good idea! I almost needed a new on boarding when I came back and took me long to get back up to speed :).

4 days work.

I think the future is in the four day week or some kind of flexible work

A 4-day work week is a good idea. But in some companies where they pay wages for shifts, they will pay less money

I think the 30 days annual leave regime should stay even after the 4 day week. The aim is not to replace one way to get more time away from work with the other. The aim is to reduce the hours in total you spend at work. You really can get more work done in less time.