I really don't want XMPP to die, but I'm worried that it can only go down hill after the big players ditched it. Is it possible for XMPP to make a major come b

I really don't want XMPP to die, but I'm worried that it can only go down hill after the big players ditched it. Is it possible for XMPP to make a major come back without their support? Would big players ever come back or are they too concerned with walled gardens?