Concepts always evolve..
I just further modded an EM69AMB and the steam is GREAT... BEST I have ever seen on any thermoblock..
Commercial... NA... Fully tested and benchmarked ... NA Life expectancy ... Who Knows...
For home use and running a small dinner party... And CUPS of coffee; not 16oz jugs of hot milk for 10 guests..
Not a problem... Not enough milk in jug... Severe Blow back is achievable; if ya want

Life of collar... TBD but with a smoother lug and more surface area in contact and less binding... One might assume that it may be able to manage misuse better...
Perfect system... No.... Fit for purpose and cost at this point in time... NOT available.. ;D
;D
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