It’s not so simple to migrate. Consider:
- Some devices have a proprietary end and a USB-A end, and there’s no USB-C equivalent (my Pebble chargers; my microphone; my webcam). I have tried dongles with these before and left disappointed every time
- some devices have a USB-A cord attached permanently, such as my desk lamp. Again, dongles are unreliable here and thus a downgrade.
- For portable devices like my standalone GPS for bike touring, my lights for my bicycle, my phone, my watch, and anything else small I might want to charge when travelling by car… I still need USB-A for the car itself. Easier to pack one cable for the whole trip instead of a USB-C cord for hotels and a USB-A cord for the car.
- My personal laptop still has USB-A ports, but no USB-C ports. As far as I can tell there are no non-sketchy adapters that go from a male USB-C cable to a female USB-A port. Apple makes a very expensive Thunderbolt2<->Thunderbolt3 adapter that I use at my desk when I want to use my personal laptop there, but that adapter is $50 or so. Already over your budget.
- I don’t have any USB-C wall warts at all. The last phone I bought was the 2016 iPhone SE. I have a plethora of USB-A wall warts from family and friends who didn’t need them. They work well.
Why are some people so hellbent on removing functionality that other people use every day and can’t replace without significant expense and inconvenience? It’s just like the damn headphone jack on iPhones: I understand that a lot of people are fine with Bluetooth only, but I am not. It’s frustrating to lose the option.