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!