We mostly meet the Goldbergs on the piano now — thanks to Glenn Gould.
But BWV 988 was written for a two-manual harpsichord, and hearing it returned to that instrument changes what you notice. There are no dynamics to lean on; the music has to persuade by line, articulation, and timing alone.
Mahan Esfahani’s 2016 recording for Deutsche Grammophon (made in Cologne on a 2013 instrument by Huw Saunders, after a *c.*1710 Harraß) takes the Aria at a daringly unhurried pace — each note detached, left to hang in the air. It’s warm rather than clinical, the opposite of the “sewing machine” caricature people carry about the harpsichord.
A good place to hear the piece as its own instrument, and not as a piano transcription played backwards: