A few points.
1. The aal lives off of contributions of peoples time. If you want to make something better, provide your time to answer your issue. It would only take about 6 hours of downloading, opening, converting and reuploading to convert everythign to SVG. We'd also need to check everything to make sure the SVG export worked correctly. If you want, I will even give you bulk access to the files to save your download hassle.
2. There are options for people to get the file in the format that they want. Namely, asking someone here, or asking me to convert a file. Rather than spend hours changing things, and possibly introducing bugs in the files by using the export feature, we could simply put a note on the site telling people about what they could do to get a file converted.
3. SVG Is the "open" standard. Unfortunately, it's implimentation in Inkscape is a bit spotty, spotty enough that there are disparities when viewing inkscape images in other vector editors ... like Batik for instance.. especially with gradient and alpha blends and text flowed into shapes. So up to this point I haven't really considered it worth extra time to convert everything if there will still be compatibility issues.
4. It was somewhat tongue-in-cheek when I said it, but I still maintain that it would be unethical to redownload demo software. In which case feel free to download the Macromedia Freehand 30 day trial and go nuts for another 30 days. Speaking of ethics though... none of us that a) have a pile of roms b) trace and share copyrighted works have much of an ethical leg to stand on.
Ultimately, it's not that I'm wholesale against making things more accessible, it's just that no one has been clamoring for it. Up to this point, it hasn't been an issue, so I think your suggestion is misplaced. As far as criticism goes, I think the word "shame" spells that out. There's no shame in us contributing stuff in the format that works for 98% of the people that actually do vector work. For the casual passers-by that just want to get the file and print it or add the word "mame" to it, they can ask for the file to be converted, or spend a few bucks on an older version of Illustrator. On a personal level, I feel that any vector drawing program that can't edit the vector information in an EPS or PDF file is not worth its salt. EPS is the industry standard for sharing vector information. If inkscape can't handle EPS yet, then it just needs some more time in the hands of its developer community. EPS is just another language... you can even write EPS by hand (not that you'd ever be inclined to...) so I don't understand why a vector drawing program wouldn't be able to use EPS. It could be a proprietary language... I don't know, but regardless it is much more common than SVG and the horse I'm betting on for the long run.