Once lived in a place that got between 70 and 110 inches annually; facing forward certainly made the tedious task slightly more palatable. Chute rotation and deflector made dealing with stiff winds easier, but still got a face full of mush too often. Have since moved to a place that gets closer to 35-50 inches. Much of that is mixed ice, slush, melting snow, stuff where the blower is less than ideal if not non-functional. So added a blade out back and have wound up going backwards often.
Not my intention to rehash the push vs pull debate; just being descriptive of what I do----operate at your own risk?.
Takes slightly more than an hour to blow anything up to about 6 inches of snow on my somewhat hilly property. Average about the same amount of time if I am using the blade to push stuff. So going backwards doesn't appear to slow things down. At some point the weight, or lack of it of the 4100 series, limits your push ability.
Despite being a "reverse professional " (back in the day I drove a cutter for Green Giant, which was a pto mounted reel and sickle bar arrangement to cut/window pea vines) my path going backwards is sometimes tad wobbly. And driveway markers suffer abuse as I cut corners.
The previous posters highlighted the cost/benefit of front vs rear. Used 47in JD front blowers in this area run about $1500-$2000. The OE Deere setup for the 4100/4010/4110/4115 works well, is easy to get on and off, but $$$ these days if you need to replace the gearbox. I've used mine in snow up to 16 inches---forward movement was slow, but it ate it.
BTW, I started out with the same blower on a X485. It blew snow about as well as the 4110. Traction wasn't as good, thing drank gas like water, and it had a unfixable cold start surging issues that lead to the upgrade.
Good luck.