I like how almost nobody likes Silver, Sega have successfully created one of the most useless characters ever.
Silver deserves to be scrapped. I think Sega will do it sooner or later - hopefully sooner. Patience is a virtue.
I don't know. Big the Cat is still around.
The bottom line is; the likes of Silver or Big can stay around as long as they want, but if nothing is to make them likable, it kind of defeats the purpose and makes them filler for far more interesting characters.