Yes, if you need multi-user engineering or energy suite. But note: projects from V15 cannot be opened in V16 without conversion (one-way only).
When you see a site claiming , check these red flags:
Siemens is a comprehensive automation software used for programming and configuring Siemens PLCs (like S7-1200 and S7-1500), HMIs, and drives. While community sites like plc247.com often host download links and guides for various PLC software versions, the most secure and official method to obtain the software is through the Siemens Industry Online Support portal. Official Download and Trial Information
16 GB minimum (8 GB for very basic tasks; 32 GB recommended for large projects).
To download from Siemens, you must have a registered account, which can take up to 48 hours for export control approval.
Automates application tests and checks for adherence to programming guidelines.
: Introduced a completely redesigned visualization system suitable for everything from HMI panels to SCADA and Industrial Edge. TIA Project Server