I disagree.  Albums have their value, especially if you have a large number of images with a common theme.  A thread works, but it will eventually get pushed down by newer posts, and the other thing is that you will likely get replies interspersed with your posts of images in that thread.  Also, there may be a limit to the number of images you upload or attach to the posts in the thread.  I don't think we have a limit on the number of images we can add to an album.

As far as resizing goes, I'm one of those who still uses a hosting site and links images, instead of loading them directly to a post or attaching them.  I found that since I belonged to several forums, each with its own size specs for images, that it was just easier to use a hosting site than to deal with different specs from one forum to the next.  There are downsides to hosting, true.  I was a Photobucket customer for example, when they decided to charge linked hosting $499, and that was the only linking they would offer.  I use Postimage now, and they have been known in the past to decline to repay their hosting and have had their address bought and held hostage a couple of times.  But there are downsides to practically everything in life.

So, I say that an album has its use. The good thing is that we can choose to create one if we want, or to create a thread, if we want.