The emergence of resistance to glyphosate was a given. Monsanto itself sells glyphosate-resistant plants, so we know exactly how it can evolve.
The resistant gene was isolated from an Agrobacterium strain. And these bacteria have been doing gene editing in plants for hundreds of millions of years, completely naturally. So it was just a matter of time until weeds gained the resistant genes from it. Or evolved them via a different mechanism.
Still, glyphosate bought us at least six decades of relatively weed-free agriculture for staple crops. Resistance is still not universal, so glyphosate will continue working for a while, helping to lower the price of food.
The resistant gene was isolated from an Agrobacterium strain. And these bacteria have been doing gene editing in plants for hundreds of millions of years, completely naturally. So it was just a matter of time until weeds gained the resistant genes from it. Or evolved them via a different mechanism.
Still, glyphosate bought us at least six decades of relatively weed-free agriculture for staple crops. Resistance is still not universal, so glyphosate will continue working for a while, helping to lower the price of food.