(This post is focused on the actual Network Effect. But of course content, people/content creators moving will help as well among other things)

Main legacy social media apps suck. So let's switch everyone to better.

Here's the solution for the Network Effect. Instead of having everyone switch fully from one to the other just have them have a foot on both sides till everyone switches over eventually.

During that we can also encourage them to get other people on the platform as they use it more

That's basically what Linux is doing via dual booting and with time/usage people will get off them since they enjoy the experience of the better alternative.

Some YouTubers are already hosting their content on multiple platforms. Many art artists already do that too

Also here are many open source alternatives I hope you will all try out/share with others in case you missed them:

Twitter ➡️ Mastodon & Bluesky

Instagram ➡️ Pixelfed, & Flashes

TkTok ➡️ Loops by Pixelfed, & Spark (Spark.so)

Discord ➡️ Matrix, & Stoat

YouTube ➡️ PeerTube

Meta Horizons ➡️ Resonite (On Steam, free)

Twitch ➡️ OwnCast, PeerTube, Glimesh, & Streamplace

Meetup ➡️ Mobilizon

Facebook ➡️ Diaspora

Snapchat ➡️ ???

Pinterest ➡️ ???

Amino ➡️ ???

Hopefully some groups can be formed to get alternatives for latter 3 done too

XMPP havent tried it yet (Think thats how you spell it)