Wide baffle designs that sound good are also possible as @db_Cooper mentioned. They are generally used to augment speakers who’s drivers are not large enough to reproduce low frequencies well.
What happens is, as the frequency decreases the waves become larger (wider) so instead if bouncing off the baffle and coming back at you, they wrap around the front baffle. The result at the listening position is a drop in low frequencies. This is known as “baffle step”. If you make the baffle large, those lower frequencies don’t have the opportunity to wrap around - they bounce off the baffle and come forward towards you. It’s basically a low frequency gain. The speaker shown above requires this because the driver is relatively small. It’s small on purpose though - it’s meant to be a single driver speaker for the benefits that gives you - namely eradicating phase issues since there’s no crossover and you’re not dealing with multiple driver acoustic centers. It’s size (relatively small) is dictated by the fact that we’re most sensitive to midrange frequencies so the driver used should be of optimal size to reproduce them.
Interestingly, THAT specific speaker is a prime candidate for a super tweeter. It uses a paper wizzer cone (in the center of mid) to reproduce high frequencies. The wizzer cones are not exceptional at very high frequencies.
But again, it’s all a series of tradeoffs. The large baffle creates a lot of reflections which produce smearing and distortion.
My personal philosophy is I want the smallest baffle possible. I want to hear only what the driver has to say - it’s the most capable of reproducing musical information properly. I don’t want to hear the cabinet. The cabinet is a passenger that’s doing it’s own thing.
In another “however”, you may prefer to hear the cabinet. There are plenty of large cabinet, large baffle designs that people enjoy. The distortion they produce gives a more “live” feeling to the presentation (if you go to a live music event, the sounds you hear are not pristine, super clear, super detailed, with a black background).
The large Klipsch speakers and the Davore Audio speakers are examples and of large baffle, “live” cabinet designs. “Live” in this case referring to the fact that they add audible artifacts, not that they sound like live music.