I use Roku. For a long time Roku sync's have been asynchronous. And I don't digitally horde my recordings, they are deleted as soon as then are watched. Thus that menu section is usually fairly empty and fast to sync.
And if you have owned a tablo for 3 years or more, you never depended on it for Live TV. Channel switching was way to slow. Thus almost everyone had directly connected antenna for fast channel switching. Why would anyone with that solution give it up for tablo Live TV.
So how are the 2.2.18 speed improvement of a help in my configuration?