Tangentially-related, I'm actually really excited to use Threads's federation with Mastodon to bring interested friends and family over to Mastodon. If you get all the same benefits (connection, more people) with none of the ads or privacy downsides, then it seems like a no-brainer to join Mastodon over Threads.
But to answer the question, no. I run my own Mastodon (and Lemmy) server. I'm kind of all-in on the fediverse.
If anything, Threads will operate more like BlueSky. Anybody who thinks they'll allow the Fediverse to gain the upper hand is sorely mistaken. Joey does not share food. Their main goal is to take over the space vacated by Twitter. Their secondary goal is to suck any data they can out of the Fediverse and discard it when it's convenient. The Fediverse is a body to step on on their way to the top.
You say that but I fully believe Meta will tamper with their instance to push external users to sign up in order to engage with anything, while limiting the ability for them to get back out, effectively aiming to become the de-facto 'center' of the fediverse.
“We’re committed to building support for ActivityPub, the protocol behind Mastodon, into this app. We weren’t able to finish it for launch given a number of complications that come along with a decentralized network, but it’s coming,” he said.
“If you’re wondering why this matters, here’s a reason: you may one day end up leaving Threads, or, hopefully not, end up de-platformed. If that ever happens, you should be able to take your audience with you to another server. Being open can enable that.”
Look, I don't want to be Devil's advocate for Meta, but I'm kinda hopeful as I truly believe they entering the fediverse can be a good thing in the long run.