Ponies have had a lot to say about Milky Way over the years. They've had a lot to say about Anon after his arrival, too. Thankfully, neither of them care anymore.
Pulling a carriage in New York City isn't all that different from pulling a carriage in Equestria. Except for the regulations—the law is complicated, and not really set up for an Equestrian pony.
Maudie Pie needs advice. Maybe from a friendlier version of her younger sister. But what are the odds that one of those will appear? As far as Maudie knows, dimensional travel isn't a thing.
The ponies of Maretime Bay don't know the lone Sea Pony who lives near their shoreline. She knows them, though. If only she could find a way up there...
We walk down our long roads of life, but what of the roads not taken? Twilight and Applejack are carried along a different path, where their fates were bound in new ways.