The best website is a naked website.
A naked website is a website with no add-ons.
A naked website has no plugins, no extensions, no modules and no large frameworks.
If you build a naked site, you'll have a website that's faster, cheaper, safer and easier.
Here are 7 reasons why you should consider building your WordPress, Joomla and Drupal with only the core features:
Reason #1: Less Maintenance
Here's what 37Signals said about features in their "Getting Real" book:
"Each time you say yes to a feature, you’re adopting a child. You have to take your baby through a whole chain of events (e.g. design, implementation, testing, etc.). And once that feature’s out there, you’re stuck with it. Just try to take a released feature away from customers and see how pissed off they get."
They were talking about building a product, but the same applies to running a website. Every module, plugin or extension requires time and energy to maintain.
A site with many add-ons requires far more frequent maintenance.
Reason #2: Fewer Conflicts
Not only does each add-on require individual maintenance, but the conflict between add-ons will multiply exponentially.
With 2 add-ons, you only need to worry about 1 possible conflict. With 20 add-ons, you have 400 possible conflicts.
A site with many add-ons requires more debugging.
Reason #3: Easier Updates
This applies to Joomla and Drupal in particular, but can also happen with WordPress.
Every time your core software updates, you need to make sure that your add-ons work with the latest release. And, if it's a major update, you need to rely on the add-on's developer to provide a migration path.
A site with many add-ons is harder update.
Reason #4: Speed
Almost every add-on loads its own files and will slow down your site. Some badly written add-ons will also load on every page of your site, regardless of whether they're needed.
A site with many add-ons is a slower site.
Reason #5: Security
Every add-on is a potential source of security holes. It's well-known that the vast majority of security holes are not found in the core software but in third-party software.
A site with many add-ons is considerably less safe.
Reason #6: Cost
This applies to WordPress and Joomla in particular. Many add-ons and themes cost from $30 to $100 or more per year. Maintaining a site with 10 add-ons can cost you several hundred dollars a year.
A site with many add-ons is a more expensive site.
Reason #7: Fit For Purpose
Every add-on you use is an admission is an indication that you're moving away from your software's real purpose. If you need 20 add-ons to turn WordPress into a full website, Joomla into a blog or Drupal into a shopping cart, then consider whether you made the wrong choice of software. Rather than try to turn software into something it wasn't meant to be, go and look for something that's more closely aligned with your goals.
A site with many add-ons is often trying to fit a square peg into a round hole.