Many parts of the stdlib are being slowly gemified, that's the case of `pstore` too hence why it has it's own repo. It's now no longer technically stdlib, but

Many parts of the stdlib are being slowly gemified, that's the case of `pstore` too hence why it has it's own repo. It's now no longer technically stdlib, but a "default gem", a gem that is installed by default with ruby, see: https://stdgems.org/ https://stdgems.org/ Since a few years every version remove one or two rarely used default gems. The Ruby core team just doesn't like big breaking changes.