Reverse engineering. I cannot stand that every product I buy requires an app (that will break with the next upgrade/or lack thereof). I realise this is a problem possibly better suited to be solved on a policy level, but I rather learn some more reverse engineering skills (which can be both very rewarding as well as frustrating) than go into politics.
Maybe also think about a structure for such things.
As in, it’s all very well to reverse engineer something for your own edification or benefit, but sharing the fruits of your labour with others would be so much better.
And further, serendipitously discovering (possibly abandoned) reverse engineering efforts on GitHub is better than nothing, but having a community working on such things, sharing progress and techniques, and offering a central point of discovery would also be so much better.