personally I think one of the reasons why it's popular is it is reminiscent of the style of the 1920s, and can thus, with a few tweaks be used to connote a connection to the past as well as implying modernity.
I can think of lots of reasons why using the 1920s as a visual source would be interesting for designers in this period, so a few people did it and others jumped on (my feeling when I started seeing it around)
https://www.illustrationhistory.org/images/uploads/held-Life...
https://hprints.com/s_img/s_md/58/58883-lillustration-des-mo...
I can think of lots of reasons why using the 1920s as a visual source would be interesting for designers in this period, so a few people did it and others jumped on (my feeling when I started seeing it around)