Hanoians' snacking habit in alleys

Hanoi's alleys have long been considered a muse for artists and writers. Through different lens of artists, they were vividly depicted in many paintings, writings and poems. Alleys in Hanoi are like spider webs and hides a very diverse and rich culinary culture that most visitors would find irresistible..

Although life of Hanoians in the early 20th century depicted in arts no longer exists, Hanoi's flavours and Hanoians' snacking habits in the alleys have never changed. What makes street food snacks in Hanoi's alleys become an integral part of Hanoians' daily life?