Yeah, but as someone who spent way too much time using SDBM and GDBM it would be nice if the Berkeley DBs were removed from the core and replaced with DBI and DBD::CSV. That way you get instant access to a lightweight database using standard DBI and SQL as well as a pre-installed hook to install whatever other DBD you need.
Of course someone probably loves the quick-and-dirty nature of the Berkeley DBM's, but I think DBI is better even for lightweight stuff. The coding/execution overhead isn't that much greater and later on it's trivial to switch out DBD::CSV with something more serious. Going from *DBM to DBI on the other hand requires a huge rewrite. Better just to encourage people to do it the DBI way to begin with, and putting those 2 modules in the core would go a long way towards doing that.