DD1 just turned 3 and is still sleeping in her crib. She can climb in and out, but stays put when I tell her to, which is a good thing. She still mightily resists going to bed, so I'm frankly terrified of moving her to a regular bed, as I'm not sure she'll stay put in that. We've also had a lot of changes lately, with dd2 being born, and we are potty training right now. So I don't want to change too many things at once.
As for going to the bathroom, I still put her in dipes for nap (when that happens
) and night. If it gets to the point where she needs to get up during the night to pee, she can get in and out of the crib on her own, so that shouldn't be a problem. I imagine that will be the point when we might try to switch to a bed.
When we're ready to make that change, I might start by lowering (not removing) the side of the crib, which will make it seem a bit different. We already have a toddler bed from Ikea, and we bought a little tent thing that goes over it to give it a more enclosed feeling, in the hope that she will feel snug and secure. But at the moment, she doesn't know that bed exists