So we can get rid of elf lineages, dragonborn ancestries, and tiefling legacies?Chalk me up as one of the folks who believes people are perfectly capable of roleplaying as something even without a game mechanic attached to it.
You can roleplay as a shaman without there being a shaman Class. You can roleplay as a lighthouse keeper without there being a lighthouse keeper Background. And you can roleplay as a half-elf without there being a half-elf Species. It's all about just who you are, how you behave, and what is important to you as a character within the story of the campaign.