I have used two bath developers for both roll and sheet film - when some advantage could be gained - usually I have not found it advantageous. However, in some instances it can be advantageous.
The emulsion type and end usage can be important to developer choice. Whether the emulsion is coated on roll film or sheet film is of secondary importance. However, some emulsions are only available for certain specific film sizes.
Barry Thornton (Edge of Darkness) migrated from split (Stoeckler type) developers to single solution developers. His reasons for migrating can be found on his website.