Some teachers and pianists prefer a clean musical source. Henle has released these new versions of Urtext Editions without fingering to accommodate that. The normal Urtext Editions with fingering also remain available.
The first Prelude from volume I of the Well-Tempered Clavier is among the most-played pieces in the piano repertoire. Though it seems easy to play, this is misleading since the performer must build up, and maintain, the musical tension. Only in the closing measures does the tension let up and lead to the more challenging fugue.