I've found libreoffice to work well enough for any docx simple enough to have come from an older version of Word, but I might just be ignorant of how Word actually differs from the tools I use to view it; it just works for me ¯\_ (ツ) _/¯ I do find the suite rather large, but use functional package management to keep most of it's files abstracted away-- I bet the appimage or flatpak is pretty sweet in the same way