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I suspect that's a bit low to cover evening streaming usage, but my main issue isn't so much the available bandwidth as selling it as 1 gbps. There should be some statutory minimum sla or something to limit the ISP's bullshit of selling you an ULTRASPEED™ GIGABIT* 1† Gbps‡ plan that reliably drops to about 0.5% of the advertised performance every night.

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3 Mbps/household is enough for evening streaming, statistical multiplexing kicks in as the number of subscribers grow. It's a bit naff, but not overly so.

Averaging 3 Mbps of usage does not mean the gigabit connection drops down to 0.5% nightly. The key here is for the ISP to have enough excess backhaul to account for the occasional burst above the 3 Mbps average. As long as there is sufficient headroom, nobody will notice the oversubscription.

This is 500 houses so oversubscribed that 1 user using their nominal bandwidth would consume 50% of the total backhaul. There isn't sufficient headroom for no one to notice.

Yes, the 2G backhaul is underdimensioned. However, that's an easy fix with a 10G upgrade. Just need to swap the optics.

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