Go is ~15p during the 20h non-cheap period, whereas Agile is usually 10p or less. So as long as you don't go too crazy during the 4-7pm peak period, Agile tends to work out cheaper (although not since the beginning of 2021, as Agile has been shockingly expensive).
Here's a screenshot from Octopus Compare of my usage over the last month, showing that Agile is probably about the same as Go (because Agile has been so expensive this year). Ignore the two charging spikes, they only appear to be a lot more expensive for Go because I charged at times that would've been expensive on Go. Given how little savings there are to be had, and given you have to pay a lot more attention to pricing, I'd say Go is the best for 95% of users. But as someone stated above, Agile is simply a manifestation of how the market is behaving, so if prices are consistently higher, then all the normal plans are going to go up in price. For me, Agile represents the least amount of hedging (and therefore profit) I'm paying for.
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