In conclusion, TIA Portal V13 SP1 Update 4 was far from obsolete in 2021. It served as a stable bedrock for existing machinery and a mandatory gateway for migrating older projects into the future of Siemens automation. Are you planning to

: Certain older S7-300 or early S7-1200 CPUs have firmware limitations that are most stably managed within the V13 environment. Stability over Innovation