Jabber was much smaller than the Fediverse when Google launched Talk.

Users are more aware of the risk now. “Oh you should go use Google Talk, it’s an open standard” is stupid in retrospect. Likewise, “you should use Threads, it’s an open standard” would be absurd. The value here is “you should use Mastodon/Lemmy/whatever, it’s a good open platform and still lets you interact with Threads users”.

It’s important to remember that the most famous example of embrace-extend-extinguish ultimately failed: Microsoft’s tweaks to Java and Javascript are long dead, Microsoft having embraced Google’s javascript interpreter and abandoned Java in favour of their home-grown .NET platform.