My 2 year old is not quite 24 pounds, so a peanut. But I still wear him for hikes nearly every day in a woven wrap, often along with his 12lb baby sister (little on the front, big one on the back). With the both of them, I suppose its the equivalent of a fairly large toddler. I can see my kid's face over my shoulder when he's on my back in the wrap.
Until what age or weight did you regularly wear your baby? - Page 2
My DD is only 22 lbs at 20 months so I can carry her easily in the Oh Snap for hours on end. That thing is the best toddler carrier ever. But I stopped wearing DD in the house around the time she learned to crawl and became annoyed at being confined and front carries were out by then too. The stroller is my most likely conveyance now (barring snow or extreme cold) for the same reasons that the OP stated. I know some people are able to wear their LOs high enough for them to be visible but I can't seem to do it. So wearing DD became weirdly impersonal if I had to do it all day by myself. Actually, I find that I don't even need my stroller all that often since DD is old enough now to walk with me and hold hands.
And we've got an ergo, but I find the mei tai so much more comfortable, and so much more supportive!
We actually stopped using the push chair when DD was 8 1/2 months old, and have never regretted it!