I think the GPLv2 is a great way to build a community through pushing people to contribute back. I've seen few GPLv3 successes so far.
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TIL Drupal has a credit system to give preferential treatment to people and organisations who contribute regularly! https://dri.es/solving-the-maker-taker-problem
Deno has the cutest PL mascot I think I've ever seen. Are there any other contenders?
Zig shipped a RISC-V backend before AArch64!
I think RISC-V is doing really well in the technology enthusiast community.
https://news.ycombinator.com/item?id=44222212