I hear a lot of good about WordPress, and a friend of mine suggested using it.
I'm launching a website (not a blog) that I'm expecting to become quite large in 1-5 years, but I'm doubting it's usage as the CMS for a website with a daily userbase in the multiple millions.
I will have some custom functionality within the site that I cannot find from WordPress plugins.
What I would like to know is, are there any good reasons for not using WordPress for a large scale website?
And what would you guys recommend? I know there are a lot of CMS's out there, but I would like to hear many different opinions.