I believe that all of the top contenders have more than sufficiently good sound quality; however, there are always people that prefer one or the other, or compare digital analysis of the different devices. I do tend to agree with you that "good tone" is a given at this level today.... or at least it is expectedI think it’s more that sound quality should be a given, it won’t really be possible to distinguish between them, so it won’t be the deciding factor like it might have been on current gen. But yes, it has to sound at least as good as an AxeFX or NAM Hyper Accuracy or NDSP plugins or whatever comparable product you like the sound of. I don’t see why that won’t be achievable.

@Orvillain, Thanks for quoting this. I missed it.That is COMPLETE nonsense!!!!! I work with plenty of businesses that put a LOT of money into developing the best products they can because they believe in the long run it will make them money. Some of them are spending billions of dollars, a few I have worked with in just the last few years are spending 10's of billions of dollars.
There are a LOT of companies that DO NOT want to compete on price selling the cheapest commodity crap to the masses. They feel like the profits are lower at the low end and Chinese cloners are going to win at that anyway, so they want to create premium products for those willing to pay more for quality.
If you think all businesses are trying to make a profit by selling the cheapest junk to the masses, perhaps it is the businesses you have been supporting, and a look in the mirror is in order.
I develop products for a living. I suspect that this one likely cost in the neighborhood of 5-10 million to develop and that is on the back of what they already had. It would cost a great deal more if you had to start from scratch.
Product management 101 gets you to your statement and is taught the world over. Line 6 DOES offer low end products, but this one isn't one of them. Just like you can get an inexpensive PRS ..... or a REALLY expensive PRS. That really high end product isn't expected to sell in the volumes that the less expensive one is; however, it will likely have better margins AND it provides marketing for the lower end products that "come along for the ride".