For the Hip Hop generation, they can understand this album. R Kelly's career was "born in the 90s", at the height of Hip Hop golden age. The genre recycled the 60s & 70s to create a new music that dominates the charts all over the world. When he recorded "Happy People/Save me", the R in RNB looked up to Marvin Gaye as an inspiration for disc 1 of that opus. Daring, but it worked to some extent. Even though "When a woman loves" is in the same mould of "If I could turn the hands of time", R Kelly has enough songs to adorn this offering. The identical "Love letter" and "Christmas love letter" have beautiful melodies, with the latter becoming one of my new staple at christmas parties. Also check out, "Number one hit" with all the song references for a hit song.
In these day and age, consistency is key to keep your customers. In this case, your fans. R Kelly has re-invented himself at various time, but has been able to retain his core fans. His honeyed melodies are uncanny and his songwriting has evolved that much, but are expected. Miguel seems to be breaking the ground, but most of the contemporaries will struggle to come close to what this guy has achieved: longetivity.