Some problems are architectural or require a major version upgrade:

Unlike typical software, the Cadence hotfix will appear to freeze at 37% or 62% . This is normal. It is rebuilding your cdsroot and patching thousands of .DLL and .EXE files. On an SSD, this takes 10-15 minutes. On an HDD, up to 45 minutes.

: New checks for via-in-pad technology and same-net adjoining vias help ensure designs are manufacture-ready early in the process.