i personally wouldn't trust these not to spy on you even disconnected. They can still scan for networks and bluetooth devices around you
So it's not even that it won't be long; I'm sure they already have designs and are just waiting for eUICC support to catch up.
There has never been a shred of evidence for any TV model actually doing this despite how often it's speculated about in comment sections.
It's kinda weird how the most sensible, straightforward mitigation for the TV spying people claim to be concerned always gets this evidence-free FUD thrown out to claim it's pointless.
I have seen open wifi reachable from places i've lived on. Spotty and intermittent connection but there. Apartment buildings with businesses on the 1st floor are also common now, those businesses may have open wifi, etc.
Linus Tech Tips showed it can be done reasonably easy actually
Or piggybacking through other TVs of the brand nearby. Might sound farfetched but so did subliminal audio watermarking to hear what kind of ads were played in the household and that was a thing too till they got caught.