When the DC-8 was introduced, the windows were spaced at one window per seat row. The actual size of the window was
a selling point. I don't think when anyone at the Douglas factory was designing the aircraft in the 1950's, they would have ever dared imagine a 28" seat pitch!!!
When Trans-Canada Airlines introduced the DC-8-41 in 1961, the seat pitch in Economy was actually the same as First Class ... and aligned with the windows. That quickly changed in 1963, with the introduction of the -50s, and the cabins were realigned.
By the time the DC-8-61 and DC-8-63's were introduced (the cabins were identical), even with a 35" seat pitch in economy, there were rows with no windows at all! I would have to dig out one of my old DC-8 manuals with all the seat charts, (AC
had about 15 different layouts for DC-8s!), but I recall something like every 7th row had no window.
Just because I stopped arguing, doesn't mean I think you are right. It just means I gave up!