We've had a nominal gigabit fiber connection for more than a year now. Let's take a look at how much of it we've been using.
Luckily, my firewall keeps track for me.
$ vnstat -m -i eth3
|month | rx | tx | total | avg. rate|
|Jan '18||476.82 GiB||26.09 GiB||502.91 GiB||1.58 Mbit/s|
|Feb '18||430.73 GiB||30.39 GiB||461.12 GiB||1.60 Mbit/s|
|Mar '18||382.38 GiB||17.60 GiB||399.99 GiB||1.25 Mbit/s|
|Apr '18||452.32 GiB||17.65 GiB||469.97 GiB||1.52 Mbit/s|
|May '18||455.75 GiB||34.72 GiB||490.47 GiB||1.54 Mbit/s|
|Jun '18||522.26 GiB||17.81 GiB||540.07 GiB||1.75 Mbit/s|
|Jul '18||748.34 GiB||144.52 GiB||892.86 GiB||2.80 Mbit/s|
|Aug '18||814.23 GiB||165.32 GiB||979.55 GiB||3.07 Mbit/s|
|Sep '18||631.82 GiB||131.18 GiB||762.99 GiB||2.47 Mbit/s|
|Oct '18||526.85 GiB||79.50 GiB||606.35 GiB||1.90 Mbit/s|
|Nov '18||483.52 GiB||44.77 GiB||528.29 GiB||1.71 Mbit/s|
|Dec '18||258.28 GiB||34.11 GiB||292.39 GiB||2.39 Mbit/s|
|estimated | 674.82 GiB | 89.12 GiB | 763.94 GiB | ---|
Yes, out of a nominal 1000Mbit/s and a measurable peak 970Mbit/s, we use a sustained... 2. Sometimes 3.
That is, if you smeared our usage out across all 24 hours of each day, that's what we use. I assure you that we would not be happy if we got a 5Mbit/s line. Instantaneous demand is a real thing.