The next generation functionals M08-HX and M08-SO resulted from exploring a more flexible functional form, with different formal constraints; while M08-SO respects the exact gradient expansion for slowly varying density up to the second order (SO) and the uniform electron gas (UEG) limit, M08-HX only respects the latter. Both functionals of the M08 generation were found to modestly improve on M06-2X for main-group thermochemistry, kinetics, and non-covalent interactions. The even more recent M11, on the other hand, is a range-separated version 174 of the M08 functionals, with the same correlation component. The percentage of HF exchange of 100% at large inter-electronic distance reduces to 42.8% at short range. The second-order density gradient expansion is also correct by construction in M11, and good across-the-board accuracy was shown thanks to the use of a further extended training set. A bit later, the M11-L functional was designed as the local analogue of M11, mainly for cost-efficiency and improved accuracy for multi-reference systems. M11-L replaces the exact exchange by a long-range meta-GGA exchange functional, that has different spatial extent and parameters than the exchange at short range.