/proc/thread-self/root/proc/self/root/proc/thread-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:devices:/10:hugetlb:/9:cpu,cpuacct:/8:freezer:/7:cpuset:/6:memory:/5:pids:/4:blkio:/3:net_cls,net_prio:/2:perf_event:/1:name=systemd:/