Established sectors and corridors generally have a more mature spread of schools, hospitals and daily-need retail, built up over a longer period of residential development. Newer corridors may still be developing this infrastructure in parallel with residential construction.
For families with specific requirements — a particular school, medical facility, or type of retail access — it is worth researching the actual current availability near a shortlisted property rather than assuming it will be equivalent to more established areas.
Planned social infrastructure (schools or hospitals announced but not yet operational) should be treated as a future possibility rather than a current convenience when evaluating a property today.