Glitch can happen, it VERY, VERY Unlikely in large end pools, it's reasonably possible in secondary pools, and from the game design stand point that is what they want. The mechanic that govern's high die pools, is Limit. Keeping you from being too successful without an element of luck. If you want more glitches there is a very easy way to get them at first, and that is simply force checks with skills Characters aren't good at. That will work for awhile, and eventually they will find a solution, it not actually that hard to develop character that will roll something like 10 dice for almost everything, but it takes time and effort. After that there are at least one other way to force glitch, there spirit power that can do it. However using that trick more then a couple times will get old very quickly, and believe me your players will start stomping on such spirits and their casters so hard.
But keep in mind, everyone has who play long enough has the seen the truly unlikely happen, 20 dice all come up 1's or 2's. Yeah it's really, really unlikely but shit does happens.
If you just want to turn up the heat on players for tech, send hackers to start bricking things guns and implants, and for magic, just introduce low to moderate background count with some regularity. That will get most players to start paying attention to the little details.