@eyespy
SLC64 has been built from woof (woof-CE build script) It's not a remaster of an existing distro.
There is no bare bone version of SLC64 if you mean this.
I think in relation to included applications the size of 383 mb is absolute okay.
Yes, virtualbox-6.1.22-144080-x86_64.sfs contains the VBoxGuestAdditions.iso.
it's located in /opt/Virtualbox/additions/VBoxGuestAdditions.iso
.
VMware Horizon Client is another application
it is a software that establishes a connection between endpoint devices and Horizon View virtual desktops and applications.
detailed info here