[bluGill]

In what way are they inferior? There are a lot of properties of building materials, and correct selection is about the compromise based on what each has. Cure time is one consideration, cured strength is another, R value, mass/volume ratio - and those are what I as a lay person can come up with: I suspect someone with more knowledge as a longer list.

[fartingflamingo]

I guess the parent commenter meant to say hydraulic limes are inferior in terms of breathability compared to hydrated lime. Which is entirely correct.

As always, it's a trade-off. Anecdotally, we did the base plaster layer on our straw bale house using hydrated lime for better breathability. We'll probably make the top coat slightly hydraulic using trass.