I wouldn’t say it’s been cool since 1977.
You’re wrong. It was still commonly referred to in TV shows, music, movies and all forms of popular entertainment. It was near the top of all “best films” lists and was well respected.
The PT may have been appealing to babies, but adults largely found it stupid. Yet, the OT remained well loved. It’s endured despite the stupid PT and silly SE, not because of them. They are classic, well made films and those types will never go out of style with general audiences.