Comment by Shog9
My observation, after using LG TVs at countless hotels (occasionally internet-connected), AirBnBs (usually internet connected) and at home (never internet-connected) is that even in quite old TVs the UI is blazing fast until you connect it to the 'Net. At that point... It spends a painful amount of time waiting on requests with no visible feedback and the whole UI starts to chug, with some apps becoming almost unusable until the thing has been on for long enough for all the background stuff to finish.
Granted... If they aren't 'Net-connected, most "apps" aren't of much use. But, fast access to settings and inputs is sorta nice too.