Building connections with other people is what social media and messengers are created for, right? In that scope, the features of relationship management ("personal CRM-like" ones) seem viable to be implemented there.
Why do services such as WhatsApp, Telegram, Facebook seemingly not go in that direction, in your opinion?
That's a good question. I would say that, to some extend, they do with their core features. Facebook shows you updates from the people you are connected to. It also tells you when it's someone's birthday. It shows you memories.<p>Now, I haven't used Facebook in years and I have no idea if people rely on it at all to maintain relationships.<p>Several companies have tried to launch "personal crm" but none really managed to make it a thing (yet?).<p>My hack is to I have a project in Todoist, with recurring tasks to touch base with my friends, clients, family, etc. It also has birthdays.