It's true that some races or subraces may now become less attractive. Others may become more so. Combinations we wouldn't consider before become viable. I dare say if a race's usefulness hinges on having the correct number for a particular class, that race is poorly designed and the ability bonus was merely band-aid all along.
I'd personnaly not say some, but a lot of... Humans, gold dwarf, shield dwarf, high elf, high half elf, mostly all gnomes, and probably the halfing and dwarf subclass that grants "bonuses against poison".
We could also talk about many others like all drows because one may find so cool to have a fairy fire once per rest, or dragonborn because they can fire breathing... but to be honnest I could personnally add even more.
Sure, it's cool to be able to create "different" builds. But you were already able to do that with a few consequences that could be toned down after a while. Now most choices are just suboptimal character-building-wise for the sake of a few players that want to RP an optimized Githyanki wizard.
