I believe Storm wore her 90s outfit in Children of the Atom and obviously switched to her Gala outfit later.
Jean wore her X-Factor costume in one issue of Hickman’s X-Men and showed up in her 90s outfit in one issue of SWORD. She also got to use the green version of her X-Men red costume in the two Giant-Size issues she was in. So surprisingly she switched outfits more than most characters (aside from Emma), but it doesn’t feel like it because most of her time was still spent in the dress.