Apple - I'm writing this on a brand new Macbook Pro, and my iPhone is sitting right next to me. I have a $5/month subscription to Apple Music. It would be painful, but with a gun to my head I could easily switch to Windows, Android, and Spotify.
Google - I'm browsing HN in Chrome, by far my favorite browser. I use google search dozens of times throughout the day to figure things out, it's truly an extension of my brain. I could switch to a new browser, but I haven't tried Bing enough recently to know if it would compare to Google.
Amazon - I have a Prime membership, but I'm only a sporadic online shopper. That said, the Amazon shopping experience has provided me with a lot of value. No real alternatives here.
Facebook - I don't use Instagram, I don't use WhatsApp, I do have a Facebook but I don't use my real name and I have very few friends. I use the News Feed Eradicator extension to get rid of the Trending section and the News Feed. Of all of the companies, I consider Facebook the most dispensable from a personal perspective . The only features I regularly use are Chat, which is functionality that existed long before Facebook, and sometimes stalking people that I just met to see more pictures and get a "life resume" on them, which is a habit that I would rather not be able to indulge in to be quite honest.
Microsoft - My work computer runs on Windows, I use Office 365 at work, and of course tons of companies that I rely on in my consumption supply chain and infrastructure are dependent on Microsoft in some form or the other.
I'm truly shocked at Facebook's ascendance to the tech stratosphere. Obviously the numbers don't lie, but Facebook just seems like it has so much lower utility than all of the other companies mentioned here. Yes, it's younger and in a newer category, but all of the other companies provide fundamental building blocks to the modern technological experience. Social media seems so much more superfluous by comparison.