It is true that if you try to reuse your 2003 Office install you will fail, but such unsupported and deprecated software will also cause trouble on a modern PC. Even if it runs, using an old version of Outlook is extremely unsafe...
Common end-user hardware does not require drivers nowadays either (not even printers due to IPPAnywhere and co., even though manufacturers still ship them for some reason).
Things are always hairy outside that though - macOS no longer permit kernel extensions, and you know you are in a dark place if DKMS gets involved on Linux.
WWDC sessions on that roadmap state quite clearly that is the long term end goal, all the kernel extension mechanisms will only be available in userspace, with one year transition for each subsystem after an userspace API is made available.