In my experience the shift from Product selling to Platform selling has meant that we've had to update the buyer personas we sell too, or at least expand them. It has meant we're no longer selling to a single buyer, but rather a buying committee - so sales has to be equipped with knowing who the members of that committee are, and what is important to them.
Selling a Platform will also inherently evolve the pitch and sales motion as well. Sales enablement will be tasked with helping the sales org sell the value at the highest level and ask the right discovery questions to hone in on the parts of the platform that are most relevant for the prospect - while still selling the vision of the entire Platform.