If you are using V13 SP1 Update 4 today, you are in a perfect position for future upgrades. This version acts as the "bridge." You cannot migrate a V11 or V12 project directly to V17; you almost always have to step through V13 SP1 first.
Update 4 was one of the final refinements for V13, fixing critical bugs and communication errors. siemens tia portal v13 sp1 update 4 better 2021
V13 runs significantly faster on older laptop hardware compared to the resource-heavy V16 or V17. If you are using V13 SP1 Update 4