Why are there no tube televisions anymore?

I’ve made a good chunk of my living as a commercial film director. As the poster above mentioned we had 550k color suites and 150k avid machines that became obsolete overnight. BTW, Those loans sucked.

My theory is that my high end Sony TVs are just about to catch up to my old Panasonic plasma in showing “directors intent”.

so much tv tech makes sports look better but movies look worse as 240hz exhausts me. 
If we all spent the time to go to tweak.tv and follow their instructions as a baseline the world would become a prettier place

while there seem to be far less intense discussions in the TV & video realm?

Different hobby.  Recreating pleasing sound/music is different from video interests.  The are many different preferences for audio sonics and many methods to achieve them.  TVs are resolution based so there is much less reasons for debate the end products-likely just which video resolves better.  

I think someone compared tweaks to religion.  Some people just don't know about not discussing/comparing politics and religion here.

Thy name is jasonbourne54.  

It's not about superiority oldhvymech. That's not how I read it.  

I still have a clear memory of helping my Dad pull 15-20 tubes out of our b&w console TV once or twice a year, when it was acting up, and driving to the Bernstein-Applebee electronics store where we’d kill an hour or so testing each one a couple times. We’d get several that rated "good" a few that rated neither good or bad and 2-3 that tested as "bad". We’d buy new replacements for the "bad ones, put them all back in the TV, cross our fingers and turn it on. Sometimes it worked and sometimes We’d have to go back and buy replacements for the ones that tested inconclusive.
It was a pain in the rear and waste of time.
I don’t miss tubes in TV’s at all.
I also remember that TV repairmen did housecalls then and kept quite busy.
My father and I built a Heathkit mono tube-amp for our 45 player and a guitar amp that I used in a terrible garage band in the 60’s. The Heathkits were rock solid.

There isn't a 4k tv made that has a native refresh rate of 240hz.