Did you read the comment you replied to ? There are no mentions of using the smart features at all, he's talking about useless menus and slow boot time.
I assumed by ”menus” he meant navigating those smart features. Not sure what other menus are frequently used? Settings? Inputs? If you even need to navigate a menu (fast or slow) for everyday use, it must have a terrible UX to begin with.
The smart features are indeed slow on most TVs. Boot times vary.
On some Samsung TVs I have used, and least one model of either TCL or Visio non-smart menu functions are slow and clumsy. Input switching on one "smart" TV in particular (I'm pretty sure it was a Visio) was like a four step process instead of a simple button press. It was really eye opening just how bad designers could screw up something that should literally be a one button press. You can't assume anything with new electronics - some of the UI designs are stupendously horrible.
