Yes I know I can open multiple images, but the problem is AIgigapixel slows down to a halt when the number exceeds more than a few hundred.
Try loading 15000 images... it's too much for AIgigapixel and it simply chokes.
I'm not sure why, but it seems like it's updating some internal list each time a new image is loaded (when you load multiple images in one go), and it seems like it has to go through the full list for each single image, which leads to a slower and slower loading. Eventually, after it has ingested a few hundred images, it becomes so slow that loading 15000 images would eventually take days or weeks to complete (I'm not talking about the resize processing time, which is actually quite fast)
In Topaz Studio this load-problem does not exist, because the batch-processing mode doesn't need to actually load all images at once, but goes through processing the images one after another.