Easiest thing I can think of off the top of my head is dealing with pivot tables. UI is terrible in OpenOffice also integrations with PowerBI does not exist along with XLookup not existing last I checked

I really like LibreOffice but I still need Excel. It’s a good 20 years ahead of the OSS software. It works find if your doing light work though

I use Newsboat from command line. Great distraction free way to get your news. Easy to open up a browser if I wanna see a video or picture too with it