I switched to Threads 7 after over 5 years with Classic, and really love the added features. If the extra features are attractive to you, then go for it!
GangsterBB.NET (Ver. 7.6.1.1) PHP Version 8.1.34 / MySQL 5.7.23-23 / Apache 2.4.67 2007 Content Rulez Contest - Hon Mention UBB.classic 6.7.2 - RIP
If the extra features are attractive to you, then go for it! 
