Restructure the catalog by distributing the number of variations across different products.
Remove configurable attribute options that are not in stock.
Manage variations through alternative features like custom options, categories, related, grouped, and bundle products.

Potential performance impact

Exceeding the recommended number of product variations can affect site performance in the following ways:

Long request and rendering times on product details and category pages containing complex products.
Increased response time to complete Save operations in the Admin.
Increased time to render the Product Edit form.
Slow checkout.