I don't think i have the same career goals as the author, so not everything apply to me.
But he On call/support advice is golden, even if your aim isn't to become the best/most irremplaceable engineer in the company. Doing support and being on call for emergency (as long as the days you're on call are well defined and you're paid OT for it) is the best way to understand what the company/team is selling, how to debug the worst code the comapny wrote and why it was written like this. I probably don't have as much experience as other engineers here, but i've been at 4 different companies, and i became usefull way faster when i was put on support first.
But he On call/support advice is golden, even if your aim isn't to become the best/most irremplaceable engineer in the company. Doing support and being on call for emergency (as long as the days you're on call are well defined and you're paid OT for it) is the best way to understand what the company/team is selling, how to debug the worst code the comapny wrote and why it was written like this. I probably don't have as much experience as other engineers here, but i've been at 4 different companies, and i became usefull way faster when i was put on support first.