We are commited to improve the usability of EPiServer both in order to make the editors' jobs easier, and to make it easier for them to create accessible web content. However, enforcing the input of alt texts for all images doesn't guarantee better accessibility. Some editors might just enter a space to get by the obstacle of mandatory input. Others might enter alt texts for all images, including purely decorative images such as lines, dots etc. that should not have the alt attribute set. Alt texts without meaning would only make it more difficult for visitors using screen readers. Of course, this depends on the web site and especially the CSS level (since high-level CSS makes the use of decorative images less frequent for editors). Therefore, it's hard to say if mandatory alt texts would really solve the problem, especially since it is the content of the alt texts that are important. But of course, since different web sites work differently and the level of CSS varies, it might be a good idea for some customers. So I'll add your suggestion to our wish list, but I can't give you an indication of neither if nor when the feature will be available. But we'll give it some thought. Thank you for the suggestion and best regards!