In Australia, the only cheese you could buy in the supermarket in the 1970s was Kraft in the little blue packets sold in the dry goods section.
To buy “real” cheese you had to go to a dairy, or go to the city centre and buy cheese cut off the block and wrapped in greaseproof paper from a contintental delicatessan.
Polyethylene film was not available.
So when it came out and you could buy real cheese in film from the supermarket, Kraft responded by bringing out "more convenient " Kraft Singles, which you didn’t have to laboriously (?) cut from the block.
5G mms is the high speed service. But its affected by wind, buildings and cars. And the phones that have it are expensive because the circuitry uses heaps of power and the battery is the most expensive part of the phone.
So mms is mainly being promoted for stationary devices, and in buildings that have repeater emitters.
The 5G low band phones are cheaper to make than 4G because the circuitry is more efficient so you can use smaller batteries.
5G has a more efficient algorithm for ordering incoming/outgoing signals, so like-for-like there is higher speed and less freezing. But in new areas the telcos just build fewer towers so the speed is no better than 4G.