Random thought but I really liked how in the Original Naruto, all of the characters' forehead protectors were tied on - and by that I mean that they were each a single piece of cloth knotted, not a circle of fabric slipped over the body.
I liked the symbolism that Kishimoto was able to invoke when he had characters tying their head bands, or when their head bands slipped off in the heat of battle. It was all quite evocative in my opinion. It made for a lot of heated dialogue between Naruto and Sasuke, and even Sakura and Ino to a lesser extent. The scene where Sakura cuts her hair and her forehead protector flies off is a great one, plus the one where she and Ino both punch their protectors off. And of course the scene where Naruto looks at Sasuke's flung off forehead protector from when he tried to scratch his forehead after Sasuke said that there's no way Naruto would be able to land even a scratch on him, is iconic. And at the very end, the last battle, when Naruto's forehead protectors comes off too, it feels like they aren't shinobi anymore, they're just Naruto and Sasuke.
Aside from the asethetics of how without the ties, the forehead protectors look more like athletic headbands, I think it is sad that we won't get moments like that in Boruto where the characters have to contend with what it means to tie the protector around themselves and be Konoha shinobi. If you ask me, it speaks to how it's no longer important to consider how each character defines themselves in and out of the Konoha ninja framework, wearing or not wearing their forehead protector, in the Boruto universe.
Of course the tension in those scenes was also developed through much stronger character backgrounds which few (if any) Boruto new gen character has, but it seems strange to think the symbolic option is precluded entirely.