I am someone who prefers a wall of text (as evident in the thread I made about 1980 internet), I do feel youtubers just take too long to explain stuff, but I will give one of videos a chance, when I find time to watch it, I usually cant dedicate more than a minute or two due to my attention deficit. Assuming its about 5g vs wired internet.
My experience is 4G used to be faster than 5G.
On EE I could hit comfortable 3 digits download, and high double digits upload.
Then then rolled out 5G in the area and 4G speeds nose dived. Read about some robbing pete to pay paul they did with the frequencies and starts to make some sense I guess, although people tried to point out to me my experience still shouldnt be the case, so I now assume my phone is not compatible with the tech EE are using for the sharing mechanism they are using, if I enable 5G download performance recovers with the caveat of really bad battery drain, however upload now looks like its permanently capped at a lower rate, with the pre 5G performance now distant history.
If I was in a DSL only area, and the signal was reliable, low congested area, and unlimited (which isnt true unlimited on mobile broadband), I would consider it. Although is reports the cell kit, gets put into low power modes over night in some areas which reduces performance over night.
4G was good enough for mass use in my opinion (on EE which to be fair was the only good 4G provider), they just needed to put it everywhere good coverage, and supply adequate backhaul, the problem now is when a new gen is rolled out, phones will keep needing to be upgraded as they downgrade the old gen when the new one is rolled out.