We often see this question, and the answer is maybe. The issue is usually not the number of plugins you install, but the size, functionality, and quality of the plugins.
Large plugins: Most plugins, except for "kitchen sink" plugins, typically contain almost all features, making it easier for users to manage the plugin. However, it may slow down your website because the more features a single plugin has, the more resources it requires.
Plugin conflicts: One of the main issues we see with plugins is feature incompatibility or duplication. Some plugins simply don’t work when installed on the same site (for example, WooCommerce doesn’t work with W3 Total Cache). Similarly, you should avoid redundant features. You only need one slider plugin, one SEO plugin, one security plugin, etc.
Poor quality: You may encounter a plugin that sounds good but slows down or completely stops your website once installed. Unfortunately, there are many poorly coded plugins on the web, which is why we always recommend using plugins from reputable sources (like WordPress.org or CodeCanyon).