> * The bloody .nfs000000 files. I think this might be fixed by NFSv4 but it seems like nobody actually uses that. (Not helped by the fact that CentOS 7 is considered "modern" to EDA people.)

Unfortunately, NFSv4 also has the silly rename semantics...

AFAIU the NFSv4 protocol in principle allows implementing unlinking an open file without silly rename, but the Linux client still does the silly rename dance.