cizeta I feel debating the merits of such a project is out of scope for this forum (it's been well discussed elsewhere) but I'll give my personal thoughts anyway
For one, some of the people involved with this project were involved with past work porting Linux and "homebrew" app SDKs to certain game consoles. Now you may be thinking, why bother running custom applications on a game console? Try going back circa 10-15 years. ARM single board computers and that like were in their infancy, and for a quiet, reasonably power efficient "media center" device your options back then were basically either questionable "MP4 players" from unknown brands or quiet but expensive custom PCs. Also given how some consoles had specs competitive with conventional PCs from around the same time (Original Xbox was famously an x86 system with a Pentium III and 64MB of RAM from around 20 years ago for less than 300 dollars) there's also a value appeal to motivate custom development for such a device.
Modern game consoles are pretty boring, because both the PlayStation and Xbox are just locked down mobile x86 chipsets that aren't that much cheaper than custom PCs these days (current shortages not withstanding). Xbox even lets you run your own UWP apps with some work (not perfect, but it's better than nothing, so many people lost interest.)
I feel the value proposition really applies to the Apple M1 systems, because outside of (possibly) certain enterprise ARM hardware, it's basically the fastest ARM64 system you can buy today and has competitive performance versus x86. Apple put the bootloader code in place to boot custom OS images, so it's not entirely a "hack" like previous Linux ports to other embedded devices. That being said, do I like Apple? Ambivalence would be a fair statement to describe my thoughts on them recently, but observing this project certainly is an interest.
But, is it worth working around so much of macbooks' proprietary hardware that's frankly not built as well as their shiny exterior's make people believe (i.e. Louis Rossmann)? I don't think so.
A counterpoint. Plenty of x86 laptops have proprietary hardware that isn't well supported on Linux, and given the variance of whats on the market, it's hard to get good developers interested in research targeting "insert random x86 laptop model here", whereas with the Apple laptops, it uses a very similar chipset between each model, so things are a little different there.
If I were to complain about the current Apple laptop hardware in the context of this post, it's that the internal storage is soldered to the motherboard. On the other hand a plausible rationale for soldered RAM is compared to socketed RAM, I believe the former can use less power because of more lenient power/signaling requirements.