multi layered exr and cryptomate support

Would be nice to import exr  with cryptomate masks   and work like that through the whole node flow    with a node to extract specific mask /channel or layer  .   Same for saving such exrs .   I 'd love the export  dialog  would have  a checkbox to save side exr file with all the necessary  masks  and channels.  Or at least  having file format and bit depth drop downs   like Painter.

It's so  disappointing to find  an old sbs  where nothing works anymore . Usually happens   a year after  with missed resources etc.     Well for me it's even half a year.   Never managed to work  with any sbs I did  after that time .   Or it just takes forever  to open with  so many  "no"   to unswer   yes/no popups.    A single automatic  side exr  file could be an easy option.