When Lex Nicoleta described her personal style as “somewhere between a character in ‘The Matrix’ and a coastal grandmother” on TikTok earlier this year, she started something much more powerful than a viral trend or an internet aesthetic. She awoke something in people across the world, who deeply identified with or aspired to the turtleneck-wearing, vacation home-dwelling lifestyles of the older female protagonists of films like “Something’s Gotta Give,” “It’s Complicated,” “Under the Tuscan Sun” and “Nights in Rodanthe.” (This was only fueled by the fact that the first on that list started streaming on Netflix in April.) (Also, while we’re here, justice for Dr. Keanu Reeves.)