Mecheon
Sacabambaspis
I will oppose this and say that I think the half races do serve as a good mix and match thingSo, yeah, my vote is what they did with 2024. Make all the "hybrid" races purely cosmetic. Fantastic. it's simpler and means that we don't need to worry about fifteen thousand "half" races in the game. Pick another race, use that race's mechanics and call it a day. Done and dusted.
Show folks how to design a new race with them as the goal like Aasimar were back in the original DMG. Explain the background weighting of features and how they're balanced internally for re-balancing, using a half-elf or half-orc as an example and the goal of "We want some features from elf, and some from human", two recognisable easy races to draw from. Let the adjustment and re-distribution of stats inspire DMs for making their own custom races
But I stubbornly will maintain they're not PHB or SRD material