Working literally every waking hour (22 hour+ coding sessions) for two weeks, I've created a replacement for our WinPE-based Windows repair CDs [1] in Linux, in anticipation of Microsoft's non-renewal of all WinPE licensing agreements to 3rd parties, and made them fit on an ISO that (GUI desktop environment, all kinds drivers and binary blobs, web browser, partition editor, custom repair tools, and all) is only 40MiB…
Sorry, this is the first i've come across it, and it looks like it's affecting other vendors as well (Paragon?) but i havn't found a useful source or summary.