Seemingly the WP developers policy is: since not everybody requires these features, and not to make WP over-bloated… all the things you’ve listed are feasible through plugins but not as core feature coming with the downloaded package.
All three have multiple solutions under WordPress. There are probably a half-dozen aggregators (plus a few rebloggers), up to a dozen gallery solutions, and numerous captcha or other security checks. That’s just a raw ‘in box’ comparison, and speaks nothing of the ‘community’ enhancements (of which the top bunch have a TON of enhancements each..).
-d
dito, moshu.
I’d also like to add the following, wordpress “plays very well with others”, in other words is much easier to intergrate with other products than some competing platforms. also, through plugins, etc, depending on your specific needs there are existing “bridge” modules for other “best of breed” solutions like coppermine photo gallery, osCommerce, xoops, and many others.
On in “standalone” mode wordpress is a lean, mean and powerful blog platform, when either used as a module or plugin (I suggest the 2.x.x versions only) with other products like xoops, etc. the possibilities for expansion/extension are limitless.
