#1: fair, but when was the last time you had to install mod_php outside of a local development environment? Ever come across commodity hosting that didn't have apache + mod_php?
#2: also fair, however Wordpress and Drupal are by far the most popular open source CMS's on the planet, despite this apparent handicap. If # of websites is your metric, what would be the closest competitor written in another language? Plone?
I'd be hesitant to call a CMS or CRM built on something that doesn't understand utf8 "robust".
There's plenty of great , well documented framework available for Java & Python too.