Hello, MPICH 5.0.0 has been released, and the release notes announces that PMI 2 is now deprecated, and recommends switching to PMI 1. It also says PMI 1 upgraded to PMI 1.2. Looking at some commits I also see that new features will be added to PMI 1. I would like to understand the technical reasons behind deprecating PMI 2, as theorically it had a better startup latency, improved KVS, and so on compared to PMI 1 [1] I understand that PMIx should be more appropriate than PMI 2 for large scale apps and this would probably be a reason to reduce efforts on supporting other PMIs, but why keep PMI1 and not PMI2? Where does PMI 2 stand at that point? Thank you!. [1] PMI: A Scalable Parallel Process-Management Interface for Extreme-Scale Systems<https://www.mcs.anl.gov/papers/P1760.pdf > Felip Moll Slurm Sr Engineer NVIDIA<https://urldefense.com/v3/__http:/www.nvidia.com/__;!!LpKI!m1it1uHwfgYmHS7qq... > [nvidia.com]<https://urldefense.com/v3/__http:/www.nvidia.com/__;!!LpKI!m1it1uHwfgYmHS7qq... >