Having too many plugins installed is generally considered a bad habit. This is true in most cases. Plugins can be just like individual pieces of code, with the added benefit of being easy to disable and easy to update through updates.
The more plugins are installed, the more risk that one of them will pose a security risk. It is more about the quality of the plugins than the amount of plugins, one very bad plugin can have more influence on the performance and security of a website than 10 well-programmed plugins.
For example, this website has 45 plugins installed at the time of writing (many of which are extensions of a plugin), yet this website is very fast and secure.
It is also important that the plugins are regularly updated, both by the author of the plugin and the user who uses them. These updates can consist of new functionalities, optimizations or security improvements.
Outdated plugins or themes is the biggest cause of a hack, no less than 98% of the websites that are hacked were not properly up to date. ( Source: https://patchstack.com/website-hacking-statistics/ )
Are you curious about my opinion about a specific plugin, don't hesitate to ask me! Or schedule a meeting without any obligation.