I couldn’t find a Shure original cable to replace mine with right away, so I got a compatible one and been rolling with it ever since. It’s slightly thinner, more flexible and without the thicker malleable parts near earbud connections. I was cautious about those differences at first, but in the end grown to prefer it more than the original, these thin wires wrap around my ears just fine.
As a side note, one of the things I treasure about the design of these IEMs is the replaceability of the cable. The IEMs themselves can probably survive for ages, which gives a nice feeling among the increasingly disposable electronics—I just hope the model would still exist on the market when something eventually happens to my unit.
Also, SE215 cost much, much less than US$800. More like $100.
— They never deafen me with connected/disconnected sounds (which can never be configured quiet enough) or music briefly playing at insane volume after switching or connecting.
— I know I get the source quality.
— I would never lose one randomly (always a chance with “true wireless” models).
— I don’t get weird phased low-frequency rumble from active noise compensation gone wonky.
— Most of all, their passive noise suppression with Shure’s black sleeves, depending on exact noise profile either beats or is on par with top-of-the-line active isolation (both according to rtings’ test benches and my subjective experience), and does not end when battery runs out inevitably at the most inconvenient time.
Addendum: 1) I connect them via a tiny Ikko Zerda DAC, which I started using way back when I still had a phone with a headphone jack (this is subjective, but with lossless sources I hear more detail—as in literally small instrument parts I didn’t hear before in complex arrangements—compared to built-in DAC). 2) I generally pass the wire under the top layer of clothing, and personally taking an earbud out and letting it dangle is about as difficult as switching on the transparent mode on AirPods (and without audio degradation inherent to such modes).