Great experience with EVANS for many years many vehicles, and I believe I have a good understanding of the coolant and its benefits. Boiling point is ridiculously high, no pressure on the cooling system (big weakness there for any automobile engine), no corrosion issues, excellent extreme duty performance, less toxicity.
For the most part, 100% food grade prolylene glycol works also for zero toxicity if that's your thing -- $25 per gallon Amazon -- (Sierra brand antifreeze was available as 100% PG in the past BTW), or mix with Evans (I mix it)
From CRF150RB with go-cart-track duty (no cooling fan... you can run the bike hard in the heat, and remove radiator cap, no pressure no hissing, just pure still fluid at 230 degrees F and the machine runs great)... to a Ducati 1098R with only a single radiator fan and Microtec ECU (full control of tuning with regard to ECT, it can run fine at 260F without any overflow bottle, I haven't run it past that, but it makes more power than lower temps)... to a F250 Diesel with all sorts of coolant issues until prepping/installing and no issues for three years... to a couple of track bikes which run 100% PG...
... to the Ford Fiesta ST, with the 2014 I have had some time with getting rid of all the water (water or ethylene glycol does not bother the evans, you just don't have all the great benefits until the water is gone). Ran the Fiesta ST back to back to back at an EVO autocross school, definitely got hot and reduced power, but never had to worry about hurting the engine, no risk of hot spots steam pockets, blown gaskets, and the coolant going to the turbo is never boiling.
Stuff boils at like 375 degrees F.
The comment about "where are you going to find Evans coolant at a gas station In death valley" it's irrelevant, add water, now you have basically a coolant called "Engine Ice" and refresh when needed, but you don't worry about running low as it's not under pressure.
Still need the overflow on a Fiesta as it's part of the re-circulation system.
I have it in the 2018 Fiesta ST now and along with Montune radiator, new silicone hoses, and a proper drain/replacement with EVANS and it's about bullet-proof, been tuning for the last few days in the 110 degree heat, coolant is 200-210 degrees during every run, very stable, very happy with it. I take the cap of every once in a while when hot to see if there's any steam left in the system (it will rise to the overflow if any water is present) and I have it working well, no pressure. I don't believe running a cooler T-STAT is needed.