Seems to me change just for change sake. Having worked for a company that did just that and spunked £40m on a product suite when it could have been done cheaper and quicker for less than £5m* , I feel sorry for these poor victims, sorry, employees.
(honestly, the justification was "I don't want any ties to the past", going as far to customise part of the old stack to look like the new - as chock, the new stuff wasn't that great so we couldn't migrate)