"At the time I had the sensation that a massive cosmic door had pivoted on its hinge and things were going to be very different from here on out."

I feel this pretty much every day now! Lyrics from an 1971 Carole King song rise up all the time: "I feel the earth move under my feet, I feel the sky come tumblin' down". 2020 was a turning point year of great magnitude. It began with a bang with the Saturn/Pluto conjunction, then an extended Jupiter/Pluto conjunction, culminating in the Grand Mutation on the winter solstice. Another famous song title from 1957 also seems apt: Whole Lotta Shakin' Goin' On!

Thanks for the interesting link.
Jim W