This is the 2018 article from which you extracted your opening line, Donuel. Listening to the talk it seems that the coronal heating problem was put down to either Alfvén waves or nano flares with many scientists thinking that it was a combination of both. The latest news that I can find, from 24 March 2022, is that The Sun's Puzzling Heating Problem Is Closer to Being Solved but still remains a puzzle. Do you have later information?