Today's solenoids seem to be very reliable, as Larry Fisher stated, and
they are quite forgiving.  In addition, if a little extra care is taken
to assure the solenoid travel is adjusted so that it is close to the
action travel distance at the solenoid contact point, then the
reproduction is a good representation of the human touch.

Modern solenoid driver circuitry usually includes logic to recognize
if a note is being held too long, so the solenoid is turned off before
it overheats and fails.  Most of the "fried" solenoids I'm aware of
have been caused by failure of that protection circuitry, not the
solenoid itself.

Roger Stern