I’d like to understand better what the plan is for PSTL.
IIUC this does not currently get included in releases made via test-release.sh (not even the serial version). Is this deliberately omitted or just something no one’s yet decided to include?
Are there teams which are distributing LLVM toolchains including libc++ with PSTL and/or PSTL+TBB? I’d like to know more about the existing use cases.
PSTL posts seem to attract silence very successfully (1, 2, 3, 4)… 
@nadiasvertex has been behind most of these, and also has an open PR.
I’m guessing the libcxx folks had more pressing priorities so far (aside from being mostly on discord & not on discourse).
For anyone subscribed here, there’s been some movement on this recently, as it’s now being planned to ingest the pstl into libcxx more directly. See here for a stack of WIP patches: ⚙ D141779 [libc++][PSTL] Copy the headers into libc++