Chris Scott
Mr Boeing did not do away with fresh air vents, they became an option - IIRC Delta always had their "Gaspers" on 757s & 767s and Canadair (Bombardier), probably because they were standard on the Challenger bizjets, still provides them on all their CRJs and even on their CSeries aircraft.
My last design work at BAC Hurn in the late 70s was on a 1-11 for RAe, a Type AP/H. This had every modern Navaid known to man including Decca Navigator, Decca Type 72 Doppler Radar (with a linked TANS), LORAN and, IIRC, a huge Litton IRS. When I saw my first L aser IRS at Boeing a year later, I couldn't believe how small it was.