@fabiobassaThe board I own is a Dolamee D5 and it has some interesting properties, but nothing out of the ordinary that the current software can't handle (for example, a 1.2GHz CPU because it's a fanless box). Other than that, what I know doesn't work is the TV remote and maybe (?) HDMI audio (I didn't test it thoroughly, it just wasn't working out of the box with sway). I could try and figure those out. I'm guessing the remote may need a driver and I've never written one before. My most advanced "kernel-esque" skill is writing to a linear frame buffer, so I hope it's not too hard.
On the topic of buying new hardware, I'm sorry but that's not a commitment I'm willing to make right now. Initially, I though this project was unmaintained (according to the webpage) and wanted to help out the best I could (providing builds, helping out in the forum, etc., basically, terminal support for these boards until something deep in the kernel eventually breaks and I don't know how to fix it). It turns out there are actually amazing people keeping this project alive, so my ways of helping are fewer, but, still like initially, I am still not invested enough (at least for now) to buy new hardware. Also, my developer experience is mostly higher level, so, even if I got new hardware, I would likely be unable to do much other than testing other people's work.