One of my clients had the need to sometime disable one variation of many, but to avoid deleting and adding again they use en little checkbox Enable in the variation setting. Really simple! But not equally simple to find out
In my investigation and work to make WooCommerce perform a little bit better i found this little surprise! The little helper wc_get_product_class to print correct class names in the wrapper element in html for me took over 100ms per product.