1. Ban PDFs uploads
This would save a shitload of disk space. PDFs don't belong on an imageboard. Why the fuck would you upload PDFs on here when you could easily link to libgen or any other external site? I am not going to open user-uploaded PDFs when it's easy to stuff viruses/malware in PDFs. User-uploaded PDFs should've been banned from the very beginning as a security precaution.
2. Board banners and image thumbnails should be compressed to lossy WebP, NOT PNG, JPG or god forbid animated GIFs
First of all it's retarded that the thumbnails of animated GIFs barely compress to a slightly smaller animated GIF. The thumbnail of an animated GIF should've always been a static image like any other imageboard handles it, it is retarded how lynxchan handles animated GIFs in general. WOW you compressed a 500kb GIF down to a 433kb GIF "thumbnail", great job you fucking faggot. Total waste of disk space and server bandwidth, every fucking user that sees that thumbnail needlessly wastes 433kb of bandwidth. What is your major malfunction, Richard?
Second, it's 2020, not 2018. Firefox 65+ and Chrome 32+ have full support for animated, lossy, alpha-transparency WebPs (thumbnails/banners should never be animated anyway btw). As a fallback for niggers still using Safari on their iPhones, you should serve them JPG thumbnails/banners that have been compressed with the quality setting of ZERO!!!!!!, NOT a quality setting of 60 as it currently is, needlessly wasting dozens of kilobytes for every single fucking user that sees it.