Anything, and i mean literally anything with a lithium ion battery cannot by definition be bifl. The batteries will eventually degenerate until unusable and are in 95% of cases not even replaceable let alone by an end user.

The same issues apply tbh. In general, the thinner bigger and finer the the driver, the better the headphone sounds, but the more delicate it is.

Imho just get headphones you like, theyll last 5-10 years. Seinheieser has p good build quality.