Thanks for the link, I have mostly been using Public Domian Vectors as an OpenClipart mirror.
https://publicdomainvectors.org/Hopefully OpenClipart itself comes back at some point, as I honestly have used it more than Opengameart. Mostly because vector graphics are easier to transform and customize, and the fact that it was all CC0 meant I did not have to worry about licensing or attribution (I personally only use a copyleft licence if it is a full production, but it if is just an isolated asset I will release it under a permissive licence; though I am glad that CC BY-SA 4 now allows GPL re-licensing).