Where is that article?

https://mikyab.net/%D7%9B%D7%AA%D7%91%D7%99%D7%9D/%D7%AA%D7%92%D7%95%D7%91%D7%95%D7%91%D7%95%D7%AA-%D7%91%D7%A2%D7%99%D7%AA%D7%95%D7%A0%D7%95%D7%AA/%D7%AA%D7%99%D7%A7%D7%95%D7%9F-%D7%A7%D7%99%D7%A0%D7%95%D7%AA-%D7%9C%D7%A9%D7%95%D7%90%D7%94/

Could you please say on which points the Rabbi changed his mind? And why?

Mainly about the very basic principled conception that there is some holiness in the canonical lamentations and that there is some barrier to their being composed by just any poet. I also changed my mind about the sanctifying and canonical attitude toward the prayer text in general (though part of it is of course halakhically binding).

“It seems to me that if one can propose a clear distinction between Reform and Conservative Jews on the one hand, and Orthodox Jews on the other, it is rooted in this point. Someone who comes to amend things (to add or remove) thinks that these matters are ‘at eye level,’ meaning that he understands them and their reasons. Someone who is wary of amending them does so because he understands that these matters are lofty beyond loftiness, and not every creature can touch them. To insert something into the prayer book, or into a canon of prayers that binds the entire Jewish people, requires a measure of divine inspiration. It seems to me that this is also part of the background to the controversy surrounding the Prayer for the Welfare of the State composed by S. Y. Agnon, but that is not the place to elaborate.”

Who would have believed that those words came from the same keyboard that owns this site.
But we still need to know at what point the Rabbi changed his mind???

I explained above. What’s unclear? You grow up…

Everything is clear; I just wrote that before the Rabbi’s response was posted.