My two cents: the only time I had an issue with Btrfs, it refused to mount without using a FS repair tool (and was fine afterwards, and I knew which files needed to be checked for possible corruption). When I had an issue with ext4, I didn't know about it until I tried to access an old file and it was 0 bytes - a completely silent corruption I found out probably months after it actually happened.
Both filesystems failed, but one at least notified me about it, while the second just "pretended" everything was fine while it ate my data.
Even Linux is slowly moving to an immutable system like Android. It is simply the best approach for an OS that non-technically-inclined people use - it's much harder to screw up beyond repair by accident - and clearly the future of operating systems (well, future for Linux at least, mobile platforms and maybe macOS are already there).