From one hour those “expert” articles:

“That is why especially for legacy carriers, where it is harder to trim costs due to staff pensions, infrastructure or cabin offerings, we are seeing more of a radical change in liveries. ”

So the writer must be an expert on paint and design, because he or she is obviously about two decades off on this.

The legacies” are the new LCCs.

Back in the day UAL’s 737s were all coach with 98 seats. SWA in the same model had 118 I believe.