A lot has been said about Lego set 21344- the Orient Express here in the Train Tech forums.
I think just about everyone here was disappointed upon learning that it did not include any official means to motorize the train. Shortly after release several folks came up with MOC solutions to motorize the train, including at least two that have been posted in the lengthy thread:
https://rebrickable.com/mocs/MOC-165803/StijnD/21344-orient-express-motorization-powered-up/#details
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