Furthermore, it keeps the United States, Canada, Mexico, South Korea, and other countries using the inferior, limited, and outdated 8VSB-modulated ATSC 1.0 standard, which is very far behind the other OFDM- based digital TV and radio standards (DVB-T/T2, ISDB-T, DTMB, DAB/DAB+, HD Radio, Digital Radio Mondiale, etc.) used around the world.
There comes a point where the improvements are much more noted in the bottom line of set manufacturers than consumers.
I don't have a 4k TV (although around the home and my home office there are 5 big screen sets... several getting on in years) because I don't see enough "enjoyable" difference. It is not worth the cost to get minor improvements and while most existing video is not at that resolution or is artificially simulated.
I'll wait until one of the sets dies and then consider higher resolution and other enhancements. For the moment, none of the upgrades is attractive enough to make the cost justifiable. Having technology for technology's sake is valueless.
I'm not a Luddite; I just upgraded to a Threadripper 3960x with a new Aorus motherboard with PCI Express 4.0 SSDs and 128gb of highest speed available memory. I did it because it was significantly and usefully faster than my last generation Intel which was slower and had fewer cores. There was extreme value; upgrading a TV device does not meet the same test.
And in radio, HD is nearly dead as it is really only useful to provide a source for an FM translator which thus increases above the "real station" ownership quota the maximum portfolio size. But nobody listens to the HD source.
And Digital Radio Mondiale has really one success story: in India the government is implementing a huge system of hundreds of transmitters, some in the hundreds of kilowatt power range. It's convenient there because re-purposing the AM band allows much greater coverage than on FM, and the government has absolute control of radio, limiting severely any commercial competitors. Elsewhere, DRM is on shortwave, which is a batch of pretty much dead radio bands.
DAB has only worked well where the government had such absolute control of radio that it could impose a total abandonment of older technologies; Scandinavian nations come to mind. In places like England, where the BBC is forcing DAB, those living in smaller towns and more rural areas have trouble getting reception indoors and in lower parts of homes and even lower parts of towns. Where it has been tried in the open market, like Canada, it has failed because consumers found no benefits.
Many of these "advancements" come from manufacturers creating shiny new things to keep renewing home electronics. Most of them are of limited value to anyone but that manufacturer.
Home electronics has gotten so reliable that manufacturers have to create reasons for people to discard old but perfectly working devices to get the latest upgrades. I used to upgrade my iPhone every year... now I find the enhancements not worth spending on for at least two and maybe three years. But I know intelligent friends who think they just "have to get it" every year.
You might note that only this year did Mexico make digital the standard for TV; given that even a smaller digital set cost more than quite a few times the monthly minimum wage, they did not want to cut off existing sets until it was no longer viable to sustain them. Not everyone around the world has the money to buy new technology, particularly if the gain is very minimal when measured against family income.