‘DTG could have charged for all the preserved collection as they have done work on it.’ You miss that if DTG hadn’t ported the content then the old routes would have lost any commercial value. Once the old routes have been ported then they can be sold as TSW2 content. If they aren’t ported then they have an issue. The old TSW1, with more routes and the new TSW2. They end up competing with themselves. Actually moving the routes (presumably it’s far less work to move them than build them from scratch) gives them a ready made cheap source of content for TSW2. Remember as in all of these things selling the base platform (the initial package) is usually a loss leader or a sale item. Where the money gets made is on the additional content. Some of those old routes - say GWE - may well be more popular with new customers than some of the new. Moving the routes also, at some point sooner than you think, allows them to drop support for TSW1. Then they don’t have to provide support for the two engine variants. They’ll more than save the money for that dedicated team I’m meant to be so happy about. Plus of course that team, as in the last paragraph, has just added lots of new saleable DLCs for TSW2. Yes, their existing customers benefit (if it’s done correctly) but there’s more commercial benefit to DTG in moving the routes.