1/2 Walled gardens are not a good option in the long term, myspace anybody? All the large platforms people use today are only here to make shareholders money. Non-chronological feeds and fake notifications are put in place to decieve users into seeing ads and spending more time.
2/2 Thankfully there are options. Real time chat existed before facebook messenger/whatsapp. Email existed before gmail. Social media existed before myspace. Unless you use federated or decentralized services you will loose your social web again and again as each company dies.
A general friendly mastodon server. No set topics but you will most likely find tech, radio, day to day life and who only knows what else here