If you are upgrading from an older version like 18.0 or 19.0, version 20.1 introduced several "hot" updates to improve the user experience:
If you are a student or a hobbyist looking for a free version, PTC offers a "Modeling Express" edition. While it has a part limit, it provides the core direct modeling experience for free. Key Features of Version 20.1
Updates to the integrated rendering engine for better design visualizations.
