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I think beyond 1gbit, the benefit become super marginal and the hardware expensiveIs it expensive though? We spend how much of our lives online. How much do you think this all-spanning life upgrade costs? What is the price of never ever dealing with buffer-bloat? Take a guess.
I calculate it as a one time $356 cost plus labor. You might have paid more for your wifi system. 128 port 25gbe switches are around $20k ($156/port). Transcievers are under $100 and you need one on both ends. For a lot of already deployed fiber, this is a drop in replacement. This is absurdly cheap. Given how cheap this is it's an obvious & enthusiastic heck yes. Who wouldnt throw down $356 right now to get 25Gbe for life?
Cost gets a bit more complicated when it comes to the POPs & their uplink. Subscribers are going to be way oversubscribed even with some fairly expensive 100Gb uplinks. As you get further from an exchange the difficulty grows geometrically (because pops become.further hops away from the ix). Peering needs to be bigger too, as does transit (but ask whether the net volume of traffic grows elastically or not), which has costs. But I think we need to frame this question a bit better, of whether it's "worth" upgrading. Honestly costs are so low it doesnt make sense not to; the rest of the world is just milking us, bilking us, charging what the market will bear, protecting it's profit centers, and this company init7 is doing what makes financial sense for the consumer. Donwe need all that? Maybe maybe not. Should we settle for less? There's almost no financial case when the hardware is so so so very cheap. This tech sounds magical but 25Gbe is not exotic, not extreme technology; "the future is already here, it's just not evenly distributed yet".