Off-topic: OpenGFX is pretty much unmaintained at this point
Of the original contributors, only Planetmaker is really active at all. I don't think it's fair that any of us expect Planetmaker to take on all the maintenance burden alone.
NML is in a similar state.
Coop repos and build farm also are unmaintained, and need a plan for a better future.
OpenTTD dev is super healthy again now, but the wider ecosystem of stuff many of us depend on is pretty fragile.
TL;DR: there are some community / coop projects that need more community
If you have useful skills, these are easy projects to contribute to:
- OpenGFX needs maintained to keep up with OpenTTD features
- NML needs maintained to keep up with OpenTTD features
- To continue extending the newgrf spec, both OpenTTD and NML need more test cases, examples and reference grfs
- NML docs need maintained
- Coop repos and build farm need a long-term plan to migrate to commodity cloud services, instead of hand-maintained VMs on a specific physical server
Your community needs you
As always, the most productive way to get these things done is #openttd irc on freenode
https://wiki.openttd.org/Irc