At approx 200k for the privilege, you are probably at least close to being the only one ?
$200k for the privilege of not needing a visa in some countries I may visit? Meh, I'll pass.
I assume it does much more than that: it allows you to live in the UK, and depending on Brexit, perhaps the EU.
2. Commonwealth citizens
You may have right of abode in the UK either because of your parents or because you are or were married to someone with right of abode.
Parents
You have right of abode if all the following apply:
one of your parents was born in the UK and a citizen of the United Kingdom and colonies when you were born or adopted
you were a Commonwealth citizen on 31 December 1982
you didn’t stop being a Commonwealth citizen (even temporarily) at any point after 31 December 1982
It does not not let you live in the UK but does make it easier to visit.
https://www.gov.uk/right-of-abode/commonwealth-citizens
Could it get you into Canada if you were a US citizen with a DUI in your past? Seems like I saw something when we visited about Canada about them not wanting any sketchy south-of-the-border US types (to include DUI holders) in their pretty country. Not sure Canada is $200k-for-a-visit pretty, but...
No DUI here, so I'm keeping my $200k
I guess I know when I'm not wanted. I've probably made my last trip to CAN. Nice place to visit, but I wouldn't want to enter it again. I'll keep my over-valued US$ to myself from now on. YMMV