My E-bike has been very useful in addition to my motorcycle.
TEST IMAGE
I’ve been using a dolly as a bike trailer with my bikes for over a decade, and I’ve found that it is indispensable for hauling heavy objects that can weigh as much as hundreds of pounds.

I got the idea from seeing the video at this link.
I’ve been having problems with the cart flipping over sometimes, especially when it is empty, and I’ve thought of ways to stop that from happening but I haven’t gotten around to implementing that.
From what I’ve learned while using it, such a cart would definitely not be safe to use with a motorcycle, however. I think a larger and more stable version could be implemented that way though.
Also something amazing happened the other week, where a large nail lodged itself into my bike tire, only for the tire not to go flat due to my putting “Flat Out” tire additive into the tube previously.

After I pulled the nail out, the tube did lose a little bit of pressure after riding it a few miles, so I filled it up again at a gas station, and I haven’t needed to put any air into it since! I’ve ridden it over 30 miles since then without any problems.

This definitely works! I haven’t even bothered to patch the tire yet.
I want to switch the positions of the front and rear tires soon because the rear tire is more heavily worn, so I suppose I will patch the tube then.