The author appears to believe that old version control systems are bad because they are old.
I have used ( and administered ) projects using RCS, CVS, SVN, Perforce, Clearcase, Git and VSS.
RCS - Advantage: no setup necessary. I used RCS to track changes to my 140 page thesis ( latex ) during the year of writing. I can still take that tar archive and extract to any workstation, PC ( windows, mac or linux) and have full access to the revision history. No setup, dirt simple. ( of course since RCS was never designed to handle more than a single person modifying the file at a time, concepts like branching, merging etc, don't exist, but for simple single person projects, this is far better than nothing ( and vastly better than manually archiving copies when you remember to)
CVS - Advantage: Supports multiple users, branching and merging (same server, DCVS variant provides some concept of distributed but should be avoided). Relatively easy to setup, and when restricted to ssh only access can be relatively secure. Disadvantage: no distributed support, very coarse security ( if you have access to the server and repository directory you have access, multiple projects on same server are clumsy to secure).
SVN - better than CVS, but harder to setup ( less obvious ?). Distributed support (sort of), but no concept of locking checkouts, so not suitable for code that is not easily merged ( VHDL and Verilog can get ugly when you try to merge what appear to be trivial changes ).
(CVS and SVN are pretty well supported via integration with many IDEs out of the box).
Clearcase - Great big bag of hurt. Avoid this if at all possible. Advantage: Large companies ( Govm't contractors ) use this tool. Ratio of administrators to users 1:10 typically, so expensive manpower. Provides distrubuted (ish) support using Multi-Site. License costs very high. Security is laughable. Any user with network access to the server ports, and an installed licensed client (access to license server) and the ability to assume root on a unix/linux machine can perform any administrative level operations of the files. The client reported username and group membership are trusted by the server to determine access privilege.
Perforce - Despite the authors grouping, P4 provides very good distributed support for controlled development projects. Using proxy servers remote access to files is pretty fast. The only tool listed so far that supports atomic checkins. If any file in the set you are submitting fails to checkin, the whole checkin fails. This may sound like a bad thing if you have never had to fix a problem where one file didn't get checked in, breaking the build. Security (access to parts of the repository) is controlled within the tool, so a fine level of granularity can be achieved. Account management can be done directly in perforce by the admin ( passwords stored locally ), or can be setup to use ldap/kerberos/Active Directory for added trust.
VSS - Small bag of hurt. Small bag because it worked so poorly that we never used it for large projects. Nothing good to say about this, just say no.
Git - I haven't used this enough to know if I like it or not. Having the repository replicated at each remote leaf (user) is nice for the distributed development, but for projects requiring close control of the source code this can be nightmarish. Since every remote site has a copy of the whole history, fixing the problem when Johnny accidentally checks in code from projectX that contractually cannot be shared with projectY can suck.