I have 899 images on my site. I attempted a bulk smush, and it died after 120 images (approx 351 files, due to various sizes). It might just be a server timeout, but I figured I'd report it.
Also, now that I've already done 120 images, it would be nice to be able to bulk "unsmushed" images.
Lastly, there were no status updates as it smushed, though I have git installed and can see all the changes.
Trying again now, will report what happens.
Got another 80 or so images (229 files) processed on attempt 2.
Only made it another 10 or so images (31 files) on attempt 3.