It fails the same 'one extra thing to carry around and keep protected while not in use, which is most of the time' test as small mirrorless point and shoots and micro four thirds interchangeable lens cameras ( speaking as a long time OM-D user and enthusiast)
And if it's possible to affix it to my phone it will also get left home sooner rather than later, because now all of my phone accessories, mag safe chargers, car mounts, cases, etc no longer fit, which makes it cumbersome to carry around and use as a phone.