I genuinely believe this could be successful.

Mastodon STILL has UX issues, and the rest of ActivityHub and the Fediverse are impenetrable to the average person. That will change over time, but in the meantime, I can't even get people to use Signal for god's sake, let alone explain which Lemmy instance is best for them.

I still have an Instagram because my friends do. Without Instagram DMs and iMessage, I lose real life connections. If they fold in a Twitter-esque client to Instagram, that I can interact with from Mastodon if I want? That sounds like a really strong value proposition to me, and is the only way your non-techy friends are joining this parade any time soon.

But also, we've got to make sure these massive companies don't snuff out what Lemmy and Mastodon are building. There's a group of suits somewhere right now thinking of how to monetise this platform, and we need to be prepared for that.