The question How do I upgrade strawberry perl without wiping \perl\site\lib\ and \perl\site\bin\? was asked in 2011 and it appears Strawberry did throw out any CPAN installs the user did whenever we upgraded to a newer version. Is this still the case? I found a comment from Adam Kennedy which seems related but I'm not sure whether the change was actually made and what its implications are.
Since Strawberry Perl is said to be "100% Open Source" I tried looking for a development site, a place where we could get more details and look at discussions, but I couldn't find any, the strawberryperl.com site is strangely devoid of any information in this regard. Even its Wikipedia page is (slightly) more informative. (Edit: I found http://code.google.com/p/strawberry-perl/ which could be a neat central portal of links, also http://search.cpan.org/~kmx/Perl-Dist-Strawberry-3.012/script/perldist_strawberry is quite informative.)
Also, in case Strawberry still does this, how can I make a local backup copy of the modules? I don't want to have to use CPAN's autobundle and redownload everything from scratch unnecessarily.
Update for future reference: from the comments I gather that since the content in site/lib and site/bin are currently build-dependent in Strawberry Perl, it's necessary to wipe them out and start afresh when installing a new version. This necessity might go away if Strawberry introduces a separate arch-directory to store architecture dependent stuff.