As you know, there is a bug: when gvfsd-smb opened too much (e.g. via socket) Gnome-Files can’t open samba with error Unhandled error message: Too many open files
I suggest to make this warning more precision: when Gnome-Files works in samba and this error happen, the warning should be like “Too many open files in samba, check it by ls -l “/proc/12345/fd” | wc -l when 12345 is PID of gvfsd-smb process“