Is protein powder a food substitute and not risky as such in theory?

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Reposting since last thread i didn't get answers.

I've read the sticky, but i still have some doubts about this stuff
>Protein Powder per day
Is there a limit on how much protein powder i can consume per day? Can it effectively provide more than 50% of my protein intake daily with no risks or complications?
>When to take it
How much protein powder can i assume per hour without killing myself? Say i need 150g of protein i couldn't get from food. That'd require quite a big shake, but can i, in theory, drink it in just a few minutes or do i have to split it up during the day?
>Micronutrients
If i manage to supplement/get my vitamins and other good shit elsewhere, can i use protein powder as a substitute for a whole meal? Or is it gonna fuck me up in the long term?
>Is pic related a good powder?
As in, can i keep buying this stuff or is this brand missing something? I like the taste enough and it's 100% whey isolated.