With completely wireless earbuds, the rule is: when the battery fails, they have to be disposed of. Not so with the Fairbuds, that allow you to replace batteries in just a few seconds. Combined with a repairable design, the earbuds should therefore have an extremely long lifetime.
Not sure why you’re getting downvoted. I’m a person with ears that do not work with silicone tips either. I love the fit of AirPods. Tried AirPods Pro, and for my ears, they suck. Doesn’t matter what size tips I use, they seal poorly and fall out constantly. Regular AirPods fit great.
Edit: grammar
Edit 2: that being said, I want to try these because I really want replaceable batteries for my earbuds. It may be moot for me though as I live in the US and currently they aren’t shipping to the US.
These in-ear things never worked for me either until they started making custom hearing protection with removable filters which are compatible with most in-ear headphones. And the best thing is that you don't need active noise canceling (depending on the openness of the headphones) because the thing is made to cancel noise. Downside is that they usually amplify bass much more than regular tips so you need to use an EQ.
Btw, it's possible to get some custom in-ear headphones where everything, including the tip, is one piece of plastic, which is supposed to sound fantastic, if you're willing to spend a ridiculous amount of money.