Sadly, the CRT manufacturers back then when it was still obviously superior to LCD and Plasma, decided to kill it early, SONY was still selling CRTs faster than flat panels when they shut down their factories.

Many people today think that noone make CRT because noone buy it, but is the opposite, you couldn't buy CRTs anymore because manufacturers intentionally killed them.

There was even research ongoing at the time to make a slim flat panel CRT, but they cancelled that too.

CRT due to being analog, doesn't support DRM, thus this contributed a lot to its rapid death. (among other reasons).

People still use CRT in some arcade machines, medical industry (for example to diagnose certain visual disorders, and a plasticity research I know, require zero update lag, thus only possible with CRT), industrial applications where flat panels are too fragile and whatnot, but all of these are basically buying existing CRTs, driving up the price.

There was some people trying to restart production, but... the companies that have the patents refuse to sell them, the companies that know how to make them also refuse to sell the machinery and whatnot, and the few independent attempts failed often due to regulations.

Also in USA someone invented a machine to recycle CRTs, and ended being shut down due to regulations too, so in USA because of regulation instead of safely melting glass and lead, the law basically says to dump it all in landfills.