Originally Posted by Unregistered

I am sure this is the general rule...

But I totally do not agree for the electronics engineering sector.

"if the job requires an intrinsic knowledge that you possess" :
you are most likely NOT going to get a premium because, if you know that knowledge you probably duno many others, your boss knows no one/very few will hire you for that specific knowledge and your pay will be crapped.

"Career lifespan - if this job only lasts 10 years, " : Coding skills are skills that have an expiry date, but yet coders are paid peanuts. A 40years old programmer with 20years coding in BASIC is no better than an ITE student when it comes to coding java.

Consider all factors and make your choice wisely...