"How often does a front-end developer need to know about /proc/pid/mem?" It's not about any particular detail, obviously. He himself does not ever have had to

"How often does a front-end developer need to know about /proc/pid/mem?" It's not about any particular detail, obviously. He himself does not ever have had to previously see /proc/pid/mem before in his life in order to solve a problem involving it. However many times a day he gets a question of any kind, that's how often.