I'm very happy with the system and I don't miss any feature or app at all.
well, our internet/tv provider has their own tv streaming app and you can't install it on Tizen since it's not IOS nor Android.
Only the pre-installed ones can be used which are/were useless in our case.
The provider goes over coax and we don't have that in that building and pulling it for 1 tv was pure overkill (was 2300 euros or so for some reason)
so bypassing that via the app was the only chance we had. I think we used an Android mini pc to bypass it.
The tv was bought with gifts without passing our (IT) department first. I would never have bought the Tizen version if I could select one.
Indeed, MS tends to fail all the time with most of their selections. That Windows 8 RT for tablets didn't let you install anything non-MS.
So they were selling tablets expensive as hell and about the only thing you could use was Office.
I'm not sure which path they took with Windows 10 for their tablet line tho.