In my opinion, ALL decent speakers should have their -3dB point at 40Hz or less. Then use subs below that if you wish. That was common advice even in the early 1980s when subs were still uncommon. Pretty little speakers don’t qualify, as much as our spouses might prefer them for their looks.
Of course, manufacturers can make larger profits selling subs plus speakers, speakers that require fewer and smaller drivers, smaller cabinets with less bracing and lower shipping costs. I call that "Boseification".