Need advice... Trying to decide if I want to get a sit and stand stroller (travel system) or just a…

Need advice... Trying to decide if I want to get a sit and stand stroller (travel system) or just a regular travel system... My daughter will be 4 when I have my baby and I'm not sure how much use the sit and stand will get. Any appointments I run ( by myself) more than likely she will be at school. But I'm also thinking about the times she'll be with me...