As a daily shell user, I want a shell that uses even less resources, and perhaps even does less. Otherwise I am going to use the default scripting shell. Today, that's an Almquist derivative as it has been for 20+ (at least, for NetBSD, Linux adoption was more recent). Never do I see proposals for a "next generation shell" which uses less resources than Almquist and can do all the same things. Anyways, Almquist shell isn't going away anytime soon, not for at least another 50 years. IMHO.