(4.1.12) Ruzsinszky : Density functionals at the meta-GGA level harbour a great potential that has not been fully exploited. The excellent performance of the SCAN and r 2 SCAN functionals and the deorbitalized meta-GGA versions 542,543 work very well for structural and energetic properties. Less is known in practice about the capability of some meta-GGAs for fundamental band gaps 512 and excited states. While the TB-mBJ potential 544 delivers accurate band gaps, its accuracy originates from fitting.