What are we talking about now? I have several years of experience on BOTH sides of the lane, so when it comes to a COMPARISON of one side of the lane vs the other, I have years of experience over someone else who only bowls on one side or the other regardless of how long they've bowled on that one side. Generally nano stuff is overkill on the left side ON A HOUSE SHOT, if you can use it, cool. Most house shots don't have the volume or the length for it to be effective. Smoother stuff in general tended to work better though because of the sharper and cleaner move on that side VS THE RIGHT SIDE.
I'm not sure who you were talking about as far as the thousands of comments about lefties not being able to open the lane up until late, but that side having more backend . . but I'll address that while we're here. Those aren't opposite, those aren't incompatible. The left side of the lane is tighter than the right, there's less area to get to the pocket, and with most of the time only your traffic on that side, it will take longer to "open up" and soften the reaction a little to where it's not so sharp and springy when you miss inside. So yes, both those things are accurate and can exist. It takes longer to "open the lane" up, which means to gain more area on the lane to hit the pocket from, BECAUSE the backends are stiffer on that side than they are on the right. Lefties have little to no miss room inside because of the sharper backends, and because the amount of traffic is lower over there, it takes longer for the lanes to open up . .
Just because they don't feel "sharp" to you, doesn't mean the strength of your motion isn't still stronger on your side of the lane than it is on the right side. I'm talking comparison, not hard and fast rules about the left side of the lane. I'm not saying the backends on the left side of the lane are sharp, I'm saying they're sharpER than the right side, that IS a thing. Righties have more room on the lane specifically because the ball motion on the backend isn't as sharp, that's why righties have more miss room inside . . because the backends aren't as strong or sharp on that side. I'm not sure what's being missed here.