Even ssd or nvme disks are not so expensive these days. LibreOffice is acitvely maintained by community. There are many options I don't need, first I used OpenOffice the ancestor to LibreOffice, and I have always get the job done.
sc was mentioned, if you really want to go that way. It is a cli tool, so you could remove GUI, that would really save space

For web browsing there area w3m, elinks, links, and lynx. mutt for email.
I was forced to use windows in my second last job. The $ms word came ready some 2007, after that there have been only pecularities added to new versions. LibreOffice is far from that.