I finally broke down and ordered a LN smoother the other day. I was surprised when I requested it be shipped with an O1 iron instead of the normal A2. The CSR helping me said they had sold the last of the O1 irons last week and would not be carrying O1 in the future. When I asked why she said they had received too many complaints about their O1 blades. Strange, I have several LN planes all with O1 steel and no problems other than sometimes the back isn't as flat as I like when you receive them. That's a pretty minor problem, I wonder what caused LN to stop O1 production.
BTW, the effect is to up the price of the LN planes because I will send some love to LV and replace the A2 LN iron with a LV PM-V11 or O1 iron. Any one like to buy a new nice and thick A2 iron for a #4.