Have to disagree with you there. I know this has been argued before, and I posted a link where manufacturer specifically stated warranty would be voided if their moulded plug was removed. Can't find it again, but it was a tv, Samsung I think.
Which may not be a comparable appliance, however I've just had to replace our dishwasher. The electrical connection instructions;
+ the connection may only be modified by technicians
+ a power cord extension may be purchased from customer services
+ if the power cord is damaged it must be replaced with a particular cord. To prevent injury, the power cord may be purchased from customer service only.
(The power cord in question is fitted with a moulded plug top one end and connector block the other end, to be inserted into the appliance).
Warranty;
We reserve the right to invalidate the warranty: -
a. If repairs or other interventions are performed by persons not authorised by us to take such action,
or if our appliances are fitted with non-original spare parts, extras or accessories'
So I think you do need to read the manufacturers or you could void the warranty.