Speaking of realibity, the color sets assambled in Romania with East-German components (<<Telcolor>> 3007 was one) had an issue with flyback transformer. They needed replacemnet from time to time. And sometimes some of them would have had electronic issuses too. But overall, they where lasting sets. And they had modular construction.

From 1965-1966 made sets, what models where the most relaible? Any of 'em was a roundie?

Zenith would be the best in my book, possibly Setchel Carlson...Zenith was still offering roundys back then.

It's kinda like today with cars.. They've been producing electric cars for over 10 years, and hybrids even longer, but yet people are still buying all gas cars the most.. But then again I don't think the technology is there yet with 100% electric cars or they are still way too expensive for average consumers..

In the states hybrids were rare till the end of the 60's....A decent number of sets had 1-2 transistors between 1962-68 but most all were majority tube or majority SS. Most all mostly SS sets prior to 1968 were portable monochrome sets. SS sets were typically twice as expensive as their based tube equivalent models.

Really it was all economy of scale...In the early days color sets were expensive and little was on. they tried to keep the price the same or make it cheaper over time, and as the number of receivers increased programming increased, and so did demand eventually demand reached economies of scale that put color in a competitive position with monochrome, and then color took off.
When the late 60's color boom (/tv shortage) hit most color sets were all tube and all sets except GE portacolors were deltagun.

If you have need x employees in a factory, they are making 10 sets a day when it would be possible for them to make 100 or 1000 what happens to TV set price when consumers decide they don't want enough for 10 a day anymore, but more like 100 or 1000 a day?