Give me a break.  A historic home owner must decide - "Do I want to live in a
museum? "Original fabric" has been altered, destroyed, removed, replaced, etc
for centuries in every residential building in America...everywhere....no
exceptions.
Yes, the question must be raised if an alteration is detrimental to the
historic integrity of the structure.  This question addressed - (in this case
removal of an admired kitchen cabinet for a dishwasher installation which
also alters the flooring to some degree), the owner decides which has
priority...the cabinet removed and saved? or wash dishes to "old fashioned
way" by hand?
If you like the cabinets ... keep them.  If you have a compelling need for a
mechanical dishwashing devise... get one.  If you have to build in ... do so.
Make the change as least destructive as possible and make it reversible (save
the cabinet or at least the face materials).
Don't get so caught up in protecting every little iota in the historic
residential house that it cannot be lived in comfortably.  If purchased to
live in EXACTLY as it was when built, then why consider a dishwasher to begin
with?  If one wants the museum piece - then so be it - thats OK.  But ....
Choose.  You can't have both, but you can be discrete and sensitive.
I am a preservationist, but very few can live today in a museum. Don't always
listen to those preservationists or restoration people that take control of
your life and are so good at wagging a so-called "professional" finger at you
.  Ask what they live in - it may be a raised ranch. Even the museums install
HVAC, protective window films, security devises, fire protection etc etc.
Protect the historic home and enjoy it.  Obsess over it and hate it.

Candy Brashears

PS: don't clean the floor, repaint or varnish cabinets - you know the dirt
and grime is historical, "original" to the fabric and a historically natural
"aging" process to be preserved!