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This is cool - I just set up Github Actions for some Rubygems that we maintain for work, it's been a breath of fresh air!

Can't wait to dig more into it tbh, just looking at this list there are so many more powerful things other than checkout/releasing code.

Agreed, there're powerful integrations for testing, deploy, and frontend performance. And some interesting, like using scheduler to update profile (https://github.com/marketplace/actions/waka-box), or tmate connection (https://github.com/mxschmitt/action-tmate).