As I age I learn to let things go, one of those things, in relevance to the thread is blade play, roughly 50% of the case knives that are delivered to me show up with side to side blade play, use to drive me up the wall and then I'll read every thing I can on the internet to see how I can cope, if possible with it. The grand consensus is to return it because seems like nobody can handle it. But the truth of the matter is, when you cut, what direction do you take? Do you cut, then twist the wrist and move sideways along the belly of the knife, or do you cut in a linear movement? I believe that as long as you use the knife as a cutting tool, and not in a manner that seems to largely be in fashion today, from what ive seen, you should be good.
Is the play ideal? No, but its no longer a deal breaker [for me].
Now we are lucky that swiss army knives from victorinox have a consistently high QC mark when it comes to shipped goods, I only had one problem and it was with the bottle opener on the bantam, the rest was golden.


YES!!!!
This is directly related to age. As you age, you realize that there are far, far, far more important things to worry about. When I was in my 20's, I was a nit picking little bastid. Then at 30 I got married to what turned out to be my life's real companion, and we had kids. Then we had grandkids. Now we're great grandparents. Let me tell ya, there's nothing like raising three kids close in age, to make you become more forgiving of things. You have to let go or go insane. You're rushed for time, short on money, lots of problems on a day to day basis, kids yelling, and forget keeping the car spotless. Forget being exactly on time anywhere, with stops for junior number 1 to make a pit stop, or junior number 2 getting car sick, or junior number 3 having a melt down because he doesn't want to go. It gets better after a few years. Like when they become teenagers and are out of the house and off with their friends.
But by the time I was in my 40's, a huge amount of my persnickidness had gone out the window. If it was close enough, or good enough, then that was oaky. And that lesson carried over to the rest of my life. Pick what's really, REALLY, important, and the rest is good enough. A little blade play? Bah, nuthin to worry over. A little dent in the car? hah, so what? A little blade rub on the SAK nail file that leaves a line on there back of the knife blade? Who cares?
Living life, a real life, is a great way to loose the nit pickiness for knife nuts, gun nuts, whatever. Those little human beings you're raising to adult hood, hopefully with some manners, knowledge of how to get along in the world, are far more important than some minor fit and finish on a knife or car. My wife got upset over a parking lot dent on our new mini van, but 20 years and 264,000 miles later it made no difference in how it went to the junkyard. For 25 years my old Buck 301 stockman was a daily user. The back of the sheep foot blade rubbed on the back the main blade and left a good line. But for 25 years, it cut all manner of things with no loss of performance in cutting because of some blade rub. And as it aged, wear and tear made some blade play in it. Again, no difference in how it cut open packages, or whatever.
Keep things in perspective. You'll keep your sanity longer.