Jailbreak stores have never felt like a particularly strong illustration of what's possible due to their tiny user market - I'd love to see what developers would do if even for a period we could use these devices to anything remotely like their potential.
But really, imagine how much power these things have and if you could actually run a free (as in freedom, in the GNU sense) OS on them and really get access to all that power in a handheld device. Only if.
I have an M1, which is like N-times faster than the laptop I write this on. Yet it collects dust because I'd rather continue to use this old dinosaur laptop because that M1 macbook is a locked down, very fast, shiny Ferrari, but I just want a Honda Civic I can do whatever I want with.
Skipping the "handheld" bit of this just for a second. You can run an (almost entirely) open stack on your hardware, and do so on an i9/9800X3D with 256GB RAM, 5080, and MultiTB of NVMe storage.
But it doesn't realy matter for 95% of users, because the hardware is already way faster than they need and the bottlenecks are on the server side and on shitty software architecture. I have an i9 with 128GB RAM for work, and Excel still takes 30+ seconds to load, Teams manages to grind the entire thing to a halt on startup, slack uses enough memory to power a spaceship... Running those apps on my desktop is pretty much the same experience as running them on my 10 year old macbook.
Which spaceship though? Not sure spaceship is the model you're looking for, as all of the ones I'm familiar have had a very locked down limited amount of memory. Apollo had something like 4Kb of memory. The space shuttle had 1MB.
Yes, pretty much everyone on this forum is aware that any Electron app is going to use way more memory than actually necessary as a trade off for developing in that ecosystem.