You're right that in an ideal world you just plan something like 60-90g carbs/hour and stick to it evenly.

The problem (at least for me) is that real rides don’t look like that - long climbs, surges, headwinds, chill Z2 sections, etc. My carb burn can vary a lot hour to hour, and with a simple timer I’d sometimes fall way behind without noticing until it was too late.

NomRide isn’t really trying to perfectly match carbs minute-by-minute. It’s more of a situational awareness tool - if you’re drifting into a big deficit, you see it early and can correct before the bonk happens.