I guess it depends a lot on what you think of as "an alternative". I'm really happy using FOSS because I generally try to find a different angle on things, and it allows me to do that.
Luckily I'm not dependent on using common office software, the few spreadsheet tasks that I need can be done with online tools, either open or proprietary. For documents I usually use markdown and pandoc. For music making, I use my own software or Ardour for mastering, etc. For modeling and 3D printing I started using OpenSCAD.
There's also many things that proprietary software just can't do. Like, my day-to-day workflow is based on a minimalist approach to computing, with the most common operations being very easy to perform (browser, editor, terminal) ... MacOS is always hailed for their great UI but honestly, it seems slow and clunky to me even though I used it daily for a long time ...
My first ever smartphone (in 2015) was a BQ Aquaris 4.5 Ubuntu Edition that came with Ubuntu Phone pre-installed ... a lightweight, 4.5" smartphone ... there wasn't much of an app ecosystem at the time but I didn't miss it because up to that date I used a dumb phone, and the smartphone allowed me to do eMail and use a browser, which was enough for me.
At some point I accidentially dropped it on a hard floor and it broke, and I was quite unhappy that the company didn't continue that line :(