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