Why use subversion when there's much more powerfull tool written in perl?

Ever heard of svk? http://svk.elixus.org, svk, it uses svn backend, but it enables interoperating with other versioning systems like cvs or perforce or even subversion

svk is an excelent showcase of perl prowess and it's ability to work with different existing repositories makes it easy to recommend to someone ( especially perl programmers ), because you're giving them just a great tool, not forcing them to 'upgrade'.

"Oh, you're using cvs? you shouldn't, move to svn" - yeah, right, and who's going to move existing repositories and THEN tell all other programmers that they should abandon cvs AND tools that use it ( like jDeveloper, go tell them that they should really be using vim and svn ).

With svk you can just use it yourself and it will push your patches/changesets to whatever your team is using (well, almost whatever, it will work with preforce, but won't work with highly proprietiary tools like bitkeeper)