macOS has both these features, sort of.
Startup chime in SGI machines depended on model. So an Indy had a different one than an Onyx. My first PC (80286) also had iconic sounds when it started up. Never forget.
Micro distro, is recovery OS. All three major desktop OSes have such, or a key combination to activate such. Android has two recovery partitions I believe, redundancy is key.
If you like the power of snapshots, yep filesystems with CoW like ZFS can show a list during boot. An OS like NixOS wouldn't even need such. Works perfectly fine with Ext4FS, including boot menu with snapshots, rollback feature, etc.
> My first PC (80286) also had iconic sounds when it started up.