I recently bought Bluetooth large headphones and I feel like they're a massive improvement. However, when it comes to earbuds (which I still use a lot when big ones are inconvenient), I would never buy wireless ones. I am afraid that in a lot of them, battery is not easily replaceable (while in my big ones it can be accessed by unscrewing a cover), and the small things would get lost fairly easily.

Same, including an IR led is such a simple thing, why did this ever go away. Though I'm pretty sure most Chinese phones still have them, Xiaomi phones do for sure

No lol. It all gets converted to an analog signal to drive the headphones. There's no difference in fidelity between 1/8" and USB-C. It's literally the exact same signal.

Honest criticisms: It's a bit of a brick for sure. I turned the RGB ring off. The multi-function button isn't as usable as I'd hoped, mostly just a flashlight/screenshot button. The headphone jack and USB port are behind a protected rubber flap, so I keep opening/closing it frequently, but that's to help with being waterproof. While the optional case functions as a good stand for horizontal viewing and for holding, it is inadequate for vertical, and it just would've needed a small internal brace to fix that. The case also blocks their wireless charging connectors, if you were planning to use a dock for that. Attaching the endoscope requires removing a tiny screw. The lack of a bottom button bar has taken some getting used to but I'm fine with it now, the side fingerprint scanner is similar.

Overall I am happy with it. The battery lasts a whole day with high use, it has decent internals for games, the screen and included protector are appropriately unobtrusive, it isn't running a very outdated version of Android. Perhaps most importantly, it should survive my child who likes to throw my phone and my dumbass who left it in my pocket getting in a pool.