org-ql is an end-user package, you don't need to be a programmer to use it. It has commands to search among your org files and most options can be customized through Emacs's customize interface. I highly recommend it for searching through org files, I find it much easier to use and also faster than the Org built-in search commands. Check out the project's README file, which includes a bunch of screenshots and animated GIFs showing org-ql in action: https://github.com/alphapapa/org-ql

¡Qué bien encontrarnos por acá!

As you say, they are basically just window configurations, so I do use them ocassionally. If, in addition to remembering an Emacs window configuration I also want to remember whether the frame is maximized or not, I will use frames instead of tabs. I used to put window configurations into registers, before tabs existed, but tabs are better because when you put a window configuration into a register it even remembers the location of point in every buffer. This means that when you restore the window configuration from the register, points get restored to where they were when you stored the configuration, not to the last time you were using it. In this sense tabs are like window configuration registers that automatically update every time you switch away from them.

Tabs only have "useless UI elements" if you want them to! This is Emacs, after all. To use tabs without displaying any UI element set tab-bar-show to nil.

This comment seem out of place here. Did you mean to post this somewhere else?

I looked at the macro expansion of the form you wrote and it looks like gibberish, so I don't think the :hook keyword allows expressions to be used as hooks, you need to define a function and use the function name:

(use-package pascal ; presumably
  :init
  (defun remove-pascal-completions ()
    (remove-hook 'completion-at-point-functions
                 'pascal-completions-at-point t))
  :hook (pascal-mode . remove-pascal-completions))

Also, the weird single quote character you used probably doesn't work in Emacs (but maybe you have normal single quotes in your file and it's just lemmy's markdown messing things up).