The article was based on the heat or in the panic of the situation where i need to get work done for which i was being paid and also my search results on the icloud/keychain recovery didnt yield any useful the results.
It's interesting how with some systems/engineering thinking you'll pretty much always get there in the end anyway, which is also why articles like yours are pretty neat. (sadly, not everyone takes the time to write things down and share them these days)