Sorry to say that your comments so far clearly indicate that you are, how shall we say, frugal.

More importantly, who cares what other people do? You're an adult, the pros and cons are fairly clear, you can make up your own mind I presume.

That said, I've switched to powder mostly for environmental reasons. You can likely find a low-cost source of maltodextrin and whatever other ingredients you prefer and roll your own, if you're willing to carry the powder. I can't imagine it's a problem for a week, longer is more likely to take up too much space. So for longer tours, commercially available powders are a better option.