[07:06:48] 45 GB of generated thumbnails, sometimes I do wish MW supported webp [07:10:09] MediaWiki might not, but wikimedia does [07:10:45] e.g. on wikimedia sites you'll get a webp thumbnail depending on the accept headers your browser sends [19:08:08] afaik MW core supports webp as input for uploads by users. generating it as optimised output thumbnail is something Thumbor does at WMF in combination with some Varnish CDN logic to only generate it for popular images.