How did GNOME developers learn almost nothing in all these years while having Extensions as a source of design that almost yells at them "you should just do this" all the time 
If you have a fediverse account, you can quote this note from your own instance. Search https://bcom.moe/users/aleksana/statuses/114211592691021790 on your instance and quote it. (Note that quoting is not supported in Mastodon.)