Is a 7-1/4 inch cordless miter saw enough, or do I need a 10 or 12 inch?

Across the reviewers we read, a 7-1/4 inch cordless saw like the DEWALT DCS361B is praised for trim, baseboard, and small framing thanks to its light weight, but specialist communities note it cannot replace a 10 or 12 inch saw for wide stock or crown molding. If you regularly cut wide boards or do cabinetry, reviewers point toward a 10 or 12 inch model.