/proc/2/root/proc/thread-self/root/proc/self/root/proc/self
This explorer reads the filesystem of the server it runs on, so /workspace/user isn't present here. Browsing and the terminal still work against this server's own disk from /.
11:pids:/10:devices:/9:hugetlb:/8:cpuset:/7:net_cls,net_prio:/6:perf_event:/5:cpu,cpuacct:/4:blkio:/3:memory:/2:freezer:/1:name=systemd:/