For a lot of people, they replaced a 10 or 20 year old TV with a "smart" one. Then just a few years later, it didn't work properly -- apps not updated, UI slow or broken, logins failed, etc.

The TV was essentially fine, but the "smart" component had aged very poorly and made the whole thing less than satisfying.

You're talking about the great and convenient parts, but for many generations of smart tv those only last a short while.