Interesting, software is topped by PS4-titles, but Switch sells more hardware. Seems people are buying from a more diverse selection of titles on Switch.
Not only new console buyers, buy games.
This year (YTD) the PS4 has sold overall more units than the Switch there.
Also if you look at the total consoles (PS4 vs Switch), Im sure it ll heavily favor the PS4.
So its not unexpected that the PS4 sells more games.
It has nothing to do with "more diverse" selection of titles as you said, infact with nintendo I'd say its often the otherway around (their main 1st party titles, are the really heavy dogs, with others not selling so much).
Number of days to reach 50M from 40M : 198 days
Number of days to reach 60M from 50M : 187 days
Number of days to reach 70M from 60M : 175 days
Number of days to reach 80M from 70M : 227 days
Necro-bump this 2020: http://gamrconnect.vgchartz.com/thread.php?id=229249