Im in New Hampshire and switched from open station to cabbed primarily to get out of the cold during snow blowing. Put me in the group that wished they had just bought the cab in the first place. It is hard for me to overstate how much more enjoyable chores are in the cold/hot/wet/bugs of New England when there is protection. I dont have a sense of being disconnected except when the wind shifts while Im snow blowing and it melts on the glass instead of on my face and clothes.
Since you are asking for downsides to a cab, I can think of a few. One is the cost. It is several thousand more to get a cabbed
B3030 vs open one. To me those are dollars well spent (I have a
B3030 with cab), but others will see it differently.
Another is that a cab raises the center of gravity of the tractor. I have a hilly property and am careful how I operate the tractor so I dont find it to be a problem, however the effect is real. I got rear wheel spacers so I could use chains and not have it interfere with the backhoe subframe, but they improve stability as well.
Another is that a tractor with a foldable ROPS can get into a standard 7 ft garage door easily, where a cabbed
b3030 is just slightly taller than that. Some guys have removed trim from their garage doors to accommodate the height.
The only other one I see is that it is harder to thread a cabbed tractor through dense wooded sections of the property because I dont like branches whacking against the glass and mirrors. In an open cab you can just duck and not worry as much. I have always kept trees trimmed in areas I mow to avoid hitting the ROPS, and its no different for me with the cab, but chores like skidding logs in unmaintained areas of the property are a different story.