The "better" edition of the software depends on your programming complexity rather than your PLC size. Reddit·r/PLC
Version 20.05 is considered a critical milestone. It is often the "better" choice for older ControlLogix and CompactLogix processors that cannot be flashed to higher firmware. It also restored minor revision compatibility, allowing users to open files created in slightly different sub-versions (like 20.01 or 20.03). rslogix 5000 version better
If you are using newer hardware like the 5580 ControlLogix or 5380 CompactLogix , the latest versions (like V33 or V35) are generally better as they offer improved performance, modern user interfaces, and better integration with Industry 4.0 tools. User consensus often points to Version 33 as a stable and reliable choice compared to the bug-prone Version 32. The "better" edition of the software depends on
Older processors have a "ceiling"—they may only support up to V16 or V20, making those the only viable options. Older processors have a "ceiling"—they may only support