What are the potential downsides of using WordPress Multisite

1. Database Size and Performance

As the number of sites increases, the database size grows significantly, which can lead to performance issues. Large databases, especially from e-commerce sites, can slow down the entire network. A crash in one site's database can potentially affect all sites within the network, making it crucial to manage database size carefully[1][3].

2. Increased Security Risks

A security vulnerability in one site can compromise the entire network. If one site experiences a DDoS attack or is hacked, it can lead to downtime or data breaches across all sites. This shared risk necessitates robust security measures and vigilant monitoring[1][2].

3. Plugin and Theme Compatibility

Not all plugins and themes are compatible with Multisite, and some may function differently than expected. This can limit options and require additional development efforts to find suitable alternatives. Additionally, some plugins may need a paid version for Multisite compatibility, increasing costs[1][3].

4. Complexity in Management

Managing a Multisite network can be complex, especially for beginners. The setup and ongoing administration require a solid understanding of WordPress architecture. This complexity can lead to challenges in troubleshooting and site migrations, making it less suitable for users without technical expertise[2][4].

5. Limited Hosting Options

Some hosting providers may not fully support WordPress Multisite, which can restrict your choices. Additionally, a Multisite setup often requires more server resources than standalone sites, making it necessary to choose a hosting plan that can accommodate this demand[3][4].

6. Shared User Management

User management can be cumbersome, as users are shared across the network. For instance, if a user is deleted from one site, their email address cannot be reused for another site within the network, creating potential administrative headaches[1].

7. Plugin Creep

As different sites may require different plugins, there can be a tendency for the network to become bloated with plugins that are not uniformly necessary across all sites. This can lead to increased resource consumption and management difficulties[1][2].

In summary, while WordPress Multisite can streamline management for multiple sites, it also introduces challenges related to performance, security, compatibility, and complexity that should be carefully considered before implementation.