I may have said vacations, but people take time off work for any number of reasons. Paternity/Maternity leave, health, family needs, and so on. I had a 2-month lapse when I moved from Germany to the United States for example.

If there were, for any reason, an internal lapse in communication or processes (imagine small companies...) that could result in a pretty sour situation.

A different continent, not planet :- )

5 or 6 weeks vacation per year, + about 1 or 2 more weeks in total, because of Christmas, NYE etc, is how things work in Scandinavia.

(I feel curious about how things are, where you live )