I've used Threads has been around on the Hive blockchain since August 2022.
Yes, it's different from Meta's Threads which just came out. LeoThreads is like Nostr in that it is web3, Meta's is...not web3. This is an example of name confusion that Hive suffers from. No, no plans for me to use Meta's Threads. Yes, I've used Hive's/Leo's Threads.