I find bubbles to best be used when there is something the user needs to do in the immediate term. If the bubbles are there for information only, an option to simply change the icon rather than produce a bubble makes a lot of sense.
Kirk
I'm not one of these cases (though I do use wifi for my network connection 99+% of the time) but if I were I would appreciate knowing when I had a connection so that I could perform online tasks. Also in the presence of multiple hotspots I would enjoy knowing I'm connected to a network I trust. Therefore I would be negatively impacted by having no notification bubble.