However, I also understand the desire of Ukrainian nationalists to revive the national language, which existed as a literary standard long before Moscow had thrown off the Mongol yoke and declared itself the "Third Rome" defender of Orthodox Christianity
"Expert" linguist is speaking again. No, there were no ukrainian, russian languages back then, let alone standards. Moreover ukrainian barely have standard now.
Literary standard my ass. All greatest ukrainian writers wrote in ..... russian.
You had to be an idiot to write in ukrainian.