I know there are bands that have massively changed line-ups over the years (Hawkwind are notable), but a core is retained and old members might return. When a key member dies, I have no idea why the band carries on in his/her absence other than to get money. Carry on recording and touring, but do it as something else.
Other examples of this are The Doors, Thin Lizzy and endless acts fom the 60's and 70's.