When will we be able to add attachments to an Email Template when sending?

What do you mean? Are you talking about FluentCRM?

Yes sending emails from teh CRM.

It would be good if you could attached a brochure, invoice etc to an email when sending.

Otherwise it means extra work uploading to and cluttering the Media Library, then get the URL and create a link in the email.

When the Template is created its simpler to just attach the doc or image and send