Are these tools still valid?

I was watching a 7 years old webinar done by Brent Ozar (https://youtu.be/U_Kle3gKaHc) , and heard of several items being recommended at that time. 1. SQLDiag utility. 2. SQLNexus. 3. PAL tool. 4. Database Tuning Advisor/wizard. 5. BPA (Best Practices Analyzer). 6. SQL Server Policy Based Management. Are all of them still to be used/considered or there is something newer that replaced them?