I know. I did not mean a technical limit, I thought of it more like a policy, which is e.g. encouraged by making a post sticky that tells people to not upload high res.
Yes, my annual christmas donation is still pending, I know. Had much trouble over the last month (very bad things happened). But I promise I’ll not forget.
However, I am sure that this is not an issue if the forum software behaves prudent. If this is not the case and we are uploading only small files as a workaround for a software flaw that may be corrected some time in the future, we might worry later when the issue is fixed, that we do not have all these wonderful images in high res.
Of course, everybody should as well be prudent about uploading images. Pulling the jpeg quality slider entirely to the right is hardly beneficial (I cannot imagine a case, when I really need mathematically accurate data I would chose png or tiff over jpeg).
Anyway, to sum up, IMO there are enough images in way too low resolution on the internet, please don’t make it a norm here. Wasting bandwidth is no option, and the nice thing here is that we do not waste it by having silly animated gifs in our signatures. But there is data that is useful and deserves spending the bandwidth. And if the issue is really not caused by missing prudence in the discourse software, I ask for explaining the issue since I then did not get the point.