A lot of words for someone who apparently isn't reading my posts in this thread. Who said a gigabit connection was available? Literally every recent post of mine is regarding the lack of/difficulty implementing.Not at all ? It is at least a little bit different.
If a friend/family member is currently streaming a movie from your collection and you reboot your computer the stream will be lost (or any data scenario you can imagine), your download box will have to wait and so on, it seem obviously different. If you upgrade your computer and its down, other people and you still has access to the data and when you upgrade your computer it is one less thing to plug in.
Has for network speed, simple gigabit network is not that much slower than non raid HDD and very often fast enough for the type of data you want. If you have 4K video and other serious workload of the size that the backup or getting back when needed at 115 megabytes by second is an issue, you probably want to have 2 different location backup anyway.
If you never shared data to multiple (unpredictable) users/machine, never wanted always available data on the network/Internet, yes obviously, but the person you responded too clearly stated primary machine, implying there is other user of the data.