A few data points for your consideration:
- The 1.3.x branch of Apache was last updated in January 2008, making it going on 2 years old. 2.2.x is about a month old. (Source)
- You are still advised to use Apache 2 prefork MPM or Apache 1, by a large scary red-on-red box at http://www.php.net/manual/en/install.unix.apache2.php.
Look, I’m not saying the world can’t turn without threads, and to the best of my knowledge there are no outstanding security problems with the latest Apache 1.3.x. It is unlikely that the threaded MPM will be the thing that people remark about on your site.
Still.
I understand the value of not chasing every last trend in the technology world but sometimes it feels like PHP is standing athwart progress, shouting ‘NO!’.



