Google can't shoulder the blame for this one alone. The company doesn't make a smartwatch of its own and depends on companies like LG to make Wear OS powered watches. These companies aren't giving us any reasons why Wear OS is better than its competition. In fact, it's tough to see any hardware partners actively giving us a reason to buy a smartwatch at all; compare that to Samsung or Apple who wants us to think life isn't complete without one on our wrist. I'll go out on a limb and say that's because of the low volume of sales each quarter, which quickly turns into a catch-22 where people don't know so they don't buy, and they don't know because they aren't buying.
Wear OS can do everything the other brands can, but nobody seems to know. Or care.
Hardware plays a big part, too. Apple and Samsung are well ahead of the newest Qualcomm wearable chipset and it will show when it comes to battery life and how well activities that can tax a processor run. I have a feeling there are a few reasons why because we all know Qualcomm is more than capable of building amazing chips for mobile devices. In the end, it comes down to money. Should Qualcomm spend billions developing a 10nm quad-core CPU with excellent wireless radios that sip battery life for products that aren't selling? I'm guessing shareholders wouldn't think so.
Source : https://www.androidcentral.com/wear-os-brink-becoming-irrelevant439