Phil, great input, I think PHP5 may be alot better now, but I think alot of people still have the stigma of instability that accompanied earlier versions.

I’ve just updated my own PHP install to PHP5(took time and alot of nerves…). I have to say that I didn’t encounter any problems with WP or anything else(except for some warnings I got about open_basedir restrictions).

As much as I know no functions where dropped (http://www.php.net/manual/en/faq.migration5.php & http://www.php.net/manual/en/migration5.incompatible.php). And many covered incompatible changes can be avoided by good programming style, so porting from PHP 4 to 5 shouldn’t be a big problem.

So the number of PHP5 Servers will increase, once that number is high enough the developer can drop the developing process of PHP4 and move on to PHP5. There are alot of benefits to PHP5!