This should be fixed.

Thanks! :)

Why we don´t have an option to use archive-attachment.php as we have attachment.php for single attachments?

Then it could be easy to filter the files using post_mime_type.

Other could be filtered the attachments if they are inside a post or not.

I know also need to create a new url like wordpress/attachment or /attachments.

Then make a gallery image or a download files archive page could be very very easy :)

First, how is there no option to replace an uploaded file? Seriously? I either have to delete my file from the library and upload the new version, or replace it through FTP access. This is a very basic necessity for website management.

Secondly, there really needs to be a way to organize media. I personally prefer the idea of folders. I like it looking uncluttered. With this, there should also be the ability to customize the slug, just like with pages.
Categories or tags would work well, too. And, please, give me the ability to have images displayed how I prefer. Right now, it's newest to oldest. Can't I have them display alphabetically? Or even group them by their categories or tags?

Plugins options are nice, but these seem like they should be part of the core experience of WordPress.

Sometimes there's only one solution, that I've found, will solve the issue. That solution is to add the following code by Mike Schroder to your functions file (ideally child theme functions file).

This code makes WordPress default to the GD image editor. I'm not an expert, maybe it's not as good as the way WordPress normally uploads and edits images. But, I do know that without the following code, I will almost always get a HTTP Error when uploading a large image. However, after adding this code, the problem is gone. No matter how big of an image I upload (within reason). This isn't the first time this code has saved me. There must be something to it.

So, my idea is, why not set WordPress up this way by default? Or, at least have a setting one can click that automatically switches to this GD image editor.

The code I'm talking about:

function ms_image_editor_default_to_gd( $editors ) {
$gd_editor = 'WP_Image_Editor_GD';
$editors = array_diff( $editors, array( $gd_editor ) );
array_unshift( $editors, $gd_editor );
return $editors;
}
add_filter( 'wp_image_editors', 'ms_image_editor_default_to_gd' );

If this is a poor solution, then there must be another way. Some way to fix/change the way WordPress uploads images and creates thumbnails. The current way is buggy and many people have the same or similar issues. Media uploads are extremely important for any CMS or blogging platform. It's time for all the WordPress gurus to put their heads together and solve this. A quick Google search will prove this is a big issue.

I've built up quite a large collection of images, some of which I can re-use and others that are once-off.

It would be great to be able to assign images to categories, not just as re-usable or not, but more specifically what type of image, i.e. office pictures, cat photos, etc.

Currently I either scroll through hundreds of images, or upload a duplicate type image where it would have been better to simply use an existing image.