We already have!

Peertube>youtube

Nostr>x

facebook>mastodon

pixelfed>instagram

lemmy>reddit

archivebox>archive.org

Simplex>discord, telegram, guilded, matrix, & slack

archive.today>waybackmachine

Jitsi Meet (self hosted), Cornychat (self hosted)>skype & whatsapp

open office/Collabora > microsoft office/365

mailfence>gmail

Betterbird>Mozilla Thunderbird

Librewolf>firefox, waterfox, brave, ie, chrome browser!