Dick, that quora reply is from Tim Morgan - a web designer who holds a ME CPL and as far as I can tell never flown a jet. Hardly the expert to pontificate on the relative safety of 2 vs 4.
And the second quote is from a first officer from a small Indian Ocean island country of less than two years airline experience.
Last edited by compressor stall; 5th Feb 2018 at 00:14.