This was literally why we went IPv6 in a previous company. We were acquiring other companies like crazy and it and the conflicts were constant pain where we'd e

This was literally why we went IPv6 in a previous company. We were acquiring other companies like crazy and it and the conflicts were constant pain where we'd either have to re-IP a location (Active Directory does not like) or do internal facing NATs and DNS weirdness (AD also not a big fan). We quickly discovered it was easier to get the new location up and running on IPv6 and mesh that so all inter-office traffic was IPv6 rather than resolving the conflicts. Sure you couldn't reach the printer in Boise from New York because it was IPv4 only, but for the stuff normal users were doing it worked great.