meh, hardly notice it anymore. Originally I thought it would visually bug me, but I got used to it very quickly.
I find it very useful as it uses less power than running a fan and ac for twice as long to clear the windshield. That and chipping ice and snow off the exterior is a breeze. I know the fan can do the job, but this is way faster. So as long as you don't follow on the vehicle ahead when they absently hit the shoulder, you should be fine.
The only time I find it frustrating is during freezing rain events. Once the cab warms up, it doesn't stay on, so you're constantly manually turning it on or running the fan at high speed at the highest heat. This always drains the battery faster than you want, and an average 150km trip can suddenly turn into a two leg journey for a quick charge in the middle. blah.
As for replacement with an aftermarket regular windshield, if you really want to go that route, one for a regular golf of the same vintage and trim level would do the trick. So far I have found that shared generic body parts, aftermarket or not, fit my e-golf. I would assume the windshield would fall under that category. Though, not sure if the controller would like it much, It might constantly kick a warning light/message.