The streaming service also confirmed that the previously announced fifth season of the animated adult comedy Star Trek: Lower Decks will be its last season. The fifth season is currently in production and will premiere on Paramount+ this Fall. The series set on the USS Cerritos with a mission focused on “second contacts” has been popular with fans and it also had its share of critical and awards attention. However, it isn’t a surprise that it will end with the fifth season. Last fall series creator Mike McMahan indicated the show may not get a sixth season, later clarifying he was always worried about additional season pickups.
I reckon this shows 5 seasons is the new 7, and I guess that's OK as long as they keep making new shows, and they give each show the chance to make a proper finale.