Only if you are locked into the V13 ecosystem. If you have any choice, go to V15.1. But if you must use V13, Update 4 is non-negotiable – running anything earlier is professional negligence.
Overall Rating: ⭐⭐⭐⭐ (4/5) Best for: Engineers working on legacy S7-1200/1500 projects who need stability without migrating to V14+. The "Better" Factor: What Improved? If you used the original TIA Portal V13 (or SP1 without updates), you know the pain: random crashes, slow cross-references, and HMI compilation errors. Update 4 was the patch that finally made V13 SP1 reliable. Siemens Tia Portal V13 Sp1 Update 4 BETTER
Always install Update 4 after SP1, not before. Use Siemens’ SIMATIC Automation Tool to verify the installation integrity. Only if you are locked into the V13 ecosystem