It's easier to "upgrade" if the existing infrastructure doesn't exist in the first place. It's easy for african countries to go fiber optics because more often than not there's no legacy equipment to upgrade so they just buy new unlike in America where the process to replace copper cabling would take years and hundreds of billions of dollars. Also It's easy to buy flat screen TV if it's the first TV you owned whereas it's going to be harder for yo average american to upgrade to flat screen TV if the CRT is working just fine especially if it's a high end Sony Trinitron TV.
You don't want to replace 20 y.o CNC machine with a new one just because said CNC machine store instructions on floppy disk. Similarly upgrading the machine would take precious manufacturing time as well as bugs to be ironed out that also cost money
I had to convince myself it is okay to throw away perfectly functional Sony Trinitron TV
China never had the legacy tech on the scale of USA or JapanWrong, refusing to let go of legacy tech is Japanese and Americans, not Chinese.