Multicore has been 'for the masses' for a decade or more by now, even in mobile phones. What is different here than with other chips made by Intel or AMD that makes you say that?
Ryzen is reasonably priced & has one socket for the 4, 8 and 6 core CPUs.
But ok, I see what you mean: anything with more than 4 cores that is affordable.
The only reason LGA 1151 has been so successful is that most of the market consists of "gamers" who are convinced that they need higher clock speed and IPC.
AM4 should only be compared to LGA 2011v3, which has a very inflated price.