Nah I thought the same but then I manually checked it. In most of the image posts I see, the image URL starts with lemmy.org.il, which made me wonder whether they’re actually downloaded or it’s some kind of whacky proxy. So I downloaded some of these pics and looked for files of identical size and hash digest, and indeed they were on my disk!
It’s not a bad decision to cache pics, because it does make the experience really smooth, and I’m not complaining about it. Mastodon does this as well
I guess they were referring to formatting other than tabs, like place of brackets and line length, which sounds like a neat idea