Make sure each section flows into the next. Define terms as needed. Use examples: maybe mention custom kernels or recovery partitions being added through patching.
Wait, is "high quality" a subjective term here? Some users might consider a patched version high quality, but others might see it as a hack. Should I mention the variability in quality of such patches?
Also, the user might be looking for a technical essay but in a clear, accessible way. Avoid overly technical jargon but don't oversimplify. Maybe include terms like NAND layout, kernel modules, partitions, etc., but explain them briefly.