while I agree with you that no one should rely solely on client-side validation - I don't believe that the OP was implying that (any) one should only use client-side validation.
Client-side validation is purely a means of reducing multiple requests / round-trips IMHO and it doesn't even have to be as reliable as a good server-side solution, but purely cover the basics, and provide quick feedback to the user while at the same time reducing load on the server.
Client-side validation is purely a means of reducing multiple requests / round-trips IMHO and it doesn't even have to be as reliable as a good server-side solution, but purely cover the basics, and provide quick feedback to the user while at the same time reducing load on the server.