At the time of writing, the following resrouces on Pega Community and Pega Academy are the best ways to get up to speed with Pega Infinity's latest feature set:

• Product by Product knowledge base on Pega Community, starting with the All Products page
• What's New videos from the Pega Community Video Library where Pega's Product Managers walk through the key features introduced in their product space. Each minor release of Pega Infinity has videos covering the major product areas, although the video series goes as far back as Pega 7.1.6.
• Get yourself "Current" in Pega Academy by reviewing the latest versions of these Missions that make reference to Pega Infinity capabilities
  • System Architect Mission;
  • Senior System Architect Mission; and
  • Lead System Architect Mission 
  • ... then by passing the Lead System Architect Mission Test, your CLSA certification is deemed Current, regardless of how long ago you passed your certification!

Discussion on this topic was sought from the LSA Data Excellence (Pega 8.4) webinar conducted in July 2020. The webinar and its full set of discussions that arose from it are available at LSA Data Excellence: Webinar, Questions & Answers.