I already use Netflix for my video streaming. Spongebob is on Amazon Prime, so I watch that. I use YouTube, XBOX, and Google Play for other stuff (other videos, some movie rentals, games, music).
I use OneDrive for storing files on a company's servers. Works great.
I normally just get books from a bookstore or library. Tried a Kindle, didn't care much for it. Truth be told, I'm not that big of a reader.
Azure is a perfectly suitable replacement for AWS - VMs, storage, functions, etc. So is GCP, but I'm not familiar enough with it.
I don't really do food delivery, though I game the coupon system a bit with Blue Apron from time-to-time, since they keep sending me $30 off a delivery when I cancel. I mainly just go to the grocery store.
Amazon is absolutely not irreplaceable for me, nor do I think it's irreplaceable for others.