I don't pay attention to trends anymore so I hadn't noticed that shags were back in and I dougbt anyone in rural west Denmark over 30 has.     I have had shags in the past but I didn't know they were called that in English.  It is a hairstyle that flatters my features and hair type so I do from time to time recommend it to women who don't desire long hair but have a similar face shape to mine even if their hair texture is different because a shag can be cut to suit any face and hair texture.  I don't know if it's called a shag if someone with very curly hair has a shag cut.  Then it's just slightly retro but not tidy enough for my taste in vintage hairstyles.  Each to their own.