persist.el vs. multisession.el?

[Adam Porter]

Hi,

[Please cc me on replies.]

Browsing the Emacs 29 pretest NEWS file, I see that multisession.el will 
be a new built-in library.  I'm curious about how this relates to the 
persist.el library that's been in GNU ELPA for a while.  Will there be 
any reason for users to use persist.el instead of multisession.el? 
Should persist.el be (eventually) obsoleted?

Also, I see that it's been requested in bug#59995 that multisession.el 
be added to GNU ELPA so it could be used in older Emacs versions, but 
the request seems to have gone unnoticed.  It seems like a good idea.

Thanks,
Adam