why is the DBI namespace reserved?

[Terrence Brannon]

I know of no other package which attempts to reserve a top-level 
namespace for itself. In fact, CPAN strongly advises aginst this 
practice. Compare with CGI, another module of equally wide use. I am 
aware of no attempt my Lincoln Stein to reserve CGI::* for modules 
developed for specific use with CGI.pm.