The bigger soundstage created by a dipole seems like the biggest potential advantage? If one wants to trade-off that for other speaker attributes, then it seems a conventional box speaker is the a lot less expensive way to achieve “good sound”. After going from 50 years of “box” speakers, as much as I’ve enjoyed them, the recent omni experience changed my view on “good sound”, the deep soundstage and immersion having added another dimension I find compelling.
You have unravel the dipole from how it makes sound. ESL's have lower distortion, run full range, are driven over the entire surface, are inefficient and require lots of power. The dipole part is only part of why people like them. Maggies do something like the same thing, but with flat magnetic panels and ribbons, and the single diaphragm is not driven full range. Then you have dipoles that are made with conventional speakers. So some of it is being cross-over-less, others are not cross over less. Others are regular speakers.
If you have 4 of any speaker, you could experiment a little. Put them back to back and in phase for bipole use, or out of phase for dipole use or just one for the normal unipolar use. By the way the old Mirage M1 and M3 speakers were pretty good bipoles.
I've had lots of dipole speakers. Quad ESL57, ESL 63, Acoustat 2 (and friends with most of the other models), Soundlabs. All ESL in that group. Then I've had both the older Maggies, and some newer Maggies with ribbon tweeters. All of these are large, difficult to ship, inefficient making them peculiar about amps, and all capable of being very enjoyable. Oh, and any decent dipole requires more space behind it to work well. So all contribute to them being expensive to work well, and you need an expensive amp, and you need the space for them to work. Some are beamy and pretty much a one person speaker.
I'm not discouraging you, just giving you an honest accounting. Jim Thiele when he started his speaker company considered doing dipoles, panels ESLs, but decided they had some advantages, but some physically unsolvable disadvantages. But then so do regular speakers. My opinion is panels driven full range have some advantages and some disadvantages. You'll have to cater to those needs which are more difficult to make work vs other good box speakers. But not that difficult. In my opinion panels with regular woofers is a no go (unless that woofer stays below 100 hz). Panels with different parts covering the different frequencies is sort of giving you back all the problems with a 2 or 3 way box speaker.