Designers are brought up to know that templates can save time when generating similar projects frequently. Some of the details will change, but the broad outlines remain very nearly the same. These, of course, don't save a lot of time if they're PSD files that get accidentally overwritten. Nor is it reasonable to store a great many templates, or very large templates, in Libraries in the Cloud, hoping to prevent an overwrite that way. Design retail sites contain more and more templates, although currently many of them are merely layered PSD files. PSDT is a format many don't even know about, but those that do, know how miserable PS makes working with them.
Please allow us to save our templates in PSDT format, or at the least our most frequently accessed templates, in a Template section of the Home Screen. You refuse to even save a .psdt format directly in PS now, plus you never retain it in Recents, so all in all, you're making more work for everyone who does benefit from .psdt templates.