Re: Resilience
It might not be an uncontended line. But VMB are still marketing it as a business grade service. And while it's open for one and all to buy into, meaning not everyone using it may be a genuine business or startup (have a genuine need for greater upload speeds), those of us who sincerely rely upon it are rightly justified in complaining.
It's also worth noting that VMB have known about the underlying issues for the better part of 2 years (since inception), yet continued to sell the Voom Fibre services. What attracts people (certanly myself) to this line of services is the price point. Sure, you get what you pay for. But everyone has to start somewhere, and uncontended fibre simply isn't an immediate option for everyone (out of budget, not fully cabled in your post code yet, etc).
That said, I agree with you that it would be short-sighted to operate in such conditions without adequate fallbacks. I have two such connections to fall back on, so I haven't been as affected as customers who've claimed it's cost them thousands.