Yes, Larry Penberthy was the guy who thought up and founded MSR. Some of the early hardware products were really innovative, like the MSR stoves. The MSR newsletter was a periodic "applications note" to customers. He tried to solve the problem of altitude sickness, but his methods were considered wrong. I mean, Rainier climbers reaching Camp Muir were being asked to urinate on pH test paper! That's OK. He wrote it up in his next newsletter.
I still have pieces and parts from MSR stoves going back to about 1978. At one point in time, I believe I had purchased six of them in all, and I was cannibalizing them to keep three in operation for group trips.
In those early years, the complexity of an MSR stove was too much for the average backpacker, and any user who was thermodynamically challenged would throw it against a tree out of frustration. But after you had used one for a week in difficult conditions, you had it figured out.
Once in the early 1980s, I led a ski group to a snowy backcountry hut in the middle of winter. This hut had an indoor sink, but no water source. Once we started cooking, we discovered that the sink drain was clogged or frozen or something. No problem. I set my hottest MSR next to the cast-iron drain pipe at floor level and turned up the flame to "blowtorch" setting. Twenty minutes later, "gurgle, gurgle" and the frozen pipe was frozen no more.