Serious question, when did everyone stop buttering the hardie?

I remember back in 2019 on a job in Spokane, my old foreman would have us butter every single piece of hardie plank before nailing it off... said it kept the seams from cracking in the dry summers. We'd go through buckets of modified thinset like it was nothing. Now I see guys just butt-jointing the boards with a 1/8 gap and hoping for the best. Last month I walked a house in Boise where every single seam was already starting to check after just two seasons. The builder blamed the material, but I could tell nobody had buttered a single board. So what gives - are y'all just trusting the fiber cement now, or did I miss a memo where the install methods changed?

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