Open Baffle. Why are they mostly limited to DIY?


I see a few hybrids from Vandersteen and Spatial Audio, but not much else. 
seanheis1
@kalali  

They are also not very versatile and sound best only with certain type of music and certain upstream gear.
Can you elaborate further? Thanks.
@willemj 

and they need a lot of power
Not necessarily. What makes you say this? Thanks.
Open baffles don't always need a lot of power. I heard the spatial audio turbo m3 in salt lake at their assembly facility through the 25 wpc Rossi integrated.  They easily played at 90+ db 14 feet back. They sounded really good. Very smooth, detailed and huge sound stage. 
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I’ve never heard an open baffle subwoofer but those who have say the bass can’t be beat because it doesn’t disturb the room modes or nearby neighbors and the tone and texture is life like.