I've owned two trikes and two two-wheelers. When our kids got old enough to travel with us I bought a trike so we'd have a spot for the kids to take turns napping while we traveled. Oh, the sacrifices of motherhood. Sigh.
After the kids were old enough to ride I went back to a two-wheeler.
After a long period of illness, during which I sold my last bike, I became healthy enough to buy another and chose a trike as my balance/reflexes aren't as sharp as they once were. That happens when you rack up the decades.
I'm pretty glad to have it and not have to give up riding. There's a heck of a lot of women my age who ride rocking chairs and I'm still out on the road! So I suppose it's all in the way you look at it.
Incidently, it does stay upright on two wheels as well, as I found out last summer when an automobile cut a corner too close for comfort. Glad to have that question answered.