Today I did my first advanced spreadsheet on LibreOffice after switching to Linux, and it handled itself pretty well. I had to search for some features on the web at first, but after I got it down, I felt comfortable using it. Also, LibreOffice’s default menu layout is not pretty, but I can find all of the functions with just a click, unlike MS Office’s ribbon menu where I had to click around to find what I was looking for. Sorry for bad English.
Indeed, LibreOffice Calc is a near-daily fixture in my operational workflow. The insistence on proprietary, data-harvesting alternatives like Google Docs is… unnecessary. For Debian-based systems, the installation process is straightforward:
sudo add-apt-repository ppa:libreoffice/ppa&sudo apt install libreoffice, referencing the official documentation at https://wiki.documentfoundation.org/Documentation/Install/Linux