"heritage" isn't about fashion, Citroen is signaling a specific value proposition and ethos through this choice. And also enough commitment to burn their one throw at this target.

They already went a similar direction with the Ami,it was a pretty bold move and it was met with very decent sales https://www.passionnement-citroen.com/post/citroen-ami-premi...

Also Renault 5 and Renault 4 seem to be selling quite well.