I have a client I just created a site for with a products CPT that has a related products field. They have nearly 800 products and all of them are listed… in a “more” sorta way. When you scroll to the bottom of the current list the next few are loaded. The search works perfectly and loads pretty quickly.
I would suggest that you also create a custom taxonomy for your email templates that allows the email templates to be sorted into “categories”. I’d probably name the taxonomy ’email-template-types’ 🙂 In the future, when there are 1000’s or templates this may help the users find them faster.
