I've found a good way to handle the smoke point is to heat butter and mix it with a cooking oil with a higher smoke point; in my experience this raises the smoke point of the butter a lot without giving up the taste.
A nice primer: https://www.tastecooking.com/all-about-butter/
Regarding the "always unsalted" advice in there, I've seen discussion from high level cooks in the past few years of "just get salted; it keeps better and when we actually tested recipes it made no difference."
The "butter plus oil has a higher smoke point" theory is like building a house that's half tungsten and half wood and claiming it can't catch fire.
Adding butter at the start, regardless of other oils, still imparts acrid flavours.
Source: I cook a lot of stuff via Sous Vide and love some of that fancy Mailard Reaction via a proper high smoke point oil and a cast iron skillet.