How well does OPNsense work with an XBOX if you don't enable upnp?

[comet]

I guess you are entitled to believe whatever lets you sleep well at night.  I think you are trying to wish a particular reality into existence.  Look at the curve on your graph, it never plateaus as real-life graphs often do, and continues to climb past 100% after April of 2020.  It's pure fantasy.

I suspect a lot of people have lost considerable sums in the stock market believing graphs like that one. How does that saying go about "lies, damn lies, and statistics?"  But if you want to believe that everyone in the world will be using IPv6 in only 2½ years, that's your prerogative; I just hope you aren't too disappointed when reality sets in.  Wishing isn't going to make it come true; though helping ordinary people understand IPv6 and how to properly secure it just might make it happen sooner (still not buying that it will happen by April 2020, though).