How much can you actually do without a windowing environment? [...] Opening images in fbi, PDFs in fbpdf, listening to music in cmus, watching movies in mplayer
Maybe not an "environment" but it sounds like you're at least using a window manager. The PDFs and videos, not to mention web browser, are gonna be hard to pull off from a raw shell. [Hard but not that hard, apparently!]
But that's a detail. Otherwise I share your enthusiasm, I've been doing things this way for a while. Basically: tiling window manager + TUI file manager + scripts which do precisely what I want, if possible in the terminal, if necessary by launching a GUI app. In practice the GUI apps are Firefox, mapping app, and messaging apps.
The general discovery I made was this: for the small price of foregoing pretty colors and buttons and chrome, you can get a computer to do exactly what you want it to do much quicker. Assuming a willingness to learn a bit of shell scripting, of course.
For example: I have a button which runs a script with getmail
that pulls in my email and then deploys ripmime
and weasyprint
to convert it to datestamped PDF files, which it dumps with any attachments directly into an inbox folder. In other words, I have made ranger
into my email client and I never need to "download" anything, it's already there.
And those PDFs I can then manipulate with a bunch of shell scripts that use standard utilities, i.e. to split them, merge them, shrink them, clean them of metadata, even make them look like they come from photocopied paper (dumb bank!). All the stupid shit I once did with 10 manipulations hunting thru menus with a pointer in a fiddly app and always forgetting how it was done. Now I just select the file in the terminal, hit a button and it's done, I don't even see the PDF.
Of course, it's not for everyone, but this is the promise of free computing.