I am in my mid forties and most people around me seem to use instagram to share memes and stuff + keep contact with rarely seen friends and whatsapp groups for closest more tightknit circles.
I am still on whatsapp but I am planning on nuking my account in september after a large event involving people from various continents. I have no idea if I will be able to stay directly in touch with those people after that, probably not.
I am still unsure if I'll send a message to most of my contacts or if I'll just tell my nuclear family, in laws and closest friends.