The harpsichord is hardly a dead instrument.
Every baroque ensemble will have one in it, and the conductor will usually lead it.
To witness the Goldberg Variations on harpsichord was one of the most profound musical experiences of my life.
Most people who criticise the 'twanginess' of sound have probably never sat at a good harpsichord and played it for an hour or so. The sound is not nearly as in your face as on recording.
The fact that harpsichords go out of tune isn't particularly a problem as a performer as you tune the instrument yourself - one of the most satisfying aspects of harpsichord playing.
May I also venture to say that pianists are about thirty years behind organists and harpsichordists in the area of Bach performance. Bach pianism is one of the most lifeless areas of the piano repertoire and pianists are currently about the 1960's era of Helmut Walcha and Karl Richter in their approach to Bach.
It takes someone like Wolfgang Rubsam, at the forefront of Bach organ performance, to really shake the foundations of Bach pianism with his NAXOS recordings.
Listen to Ton Koopman, Masaaki Suzuki and Christopher Hogwood to get an idea of how to bring the harpsichord to life, instead of dismissing it in the absence of the "Hit harder, make go louder" option.
Theodopolis