@hellomiakoda where we come from, removal of the MD_LINEAR target would be announced, loudly, years in advance, overt warnings about using it across every kernel version following that anouncement, documentation on how to convert MD_LINEAR arrays to some other format without data loss, offers to externalise that target into a best-effort support module, and then, maby 8-10 years after the announcement, *then* it gets removed. As far as we could tell, the Linux removal of that target went like this:
LKML dev 1: should we remove MD_LINEAR?
LKML dev 2: yeah, fuck it! *yank*