Would be nice to see a feature added to Tableau Prep that allowed for an incremental update from the data source similar to what is available in Tableau Desktop. I know this can be achieved through some clever formulas and such but it shouldn't be so difficult. A dialog similar to the one attached would be nice to append an incremental update based on a defined field in the data source (such as date).
--> Community Manager update [Ciara Brennan]
Also refer to Duplicate idea #9282 https://community.tableau.com/ideas/9282 ( 20 Votes )
Aug 20th 2019: idea marked as 'Planned' as requested by Anushka Anand