Will We Ever Get Rid Of ASCII?

GeZ asks: "When will Unicode finally replace ASCII? When will 7-bit-encoded text finally disappear? When will 'extented' chars (like 'é' or 'ß', etc) be recognized as 'alphanumerics', letting us use all characters we want for file names, functions names, and DNS names? Most top-level modern apps and standards use Unicode so it deserves to be integrated at the lowest level, now. I really think old ASCII is too limited and fragmented to be useful. Using metachars in an ASCII file (a la HTML entity) is a boring way to solve the problem. A perfect integration with OSes (and base libraries) will "magically" make nearly all apps Unicode compliant, no? Yes, text chars will be encoded on 16 bits intead of 7 or 8 and would double text file size, but is this really troublesome, given today's storage medias?" Do any of you think that Unicode will completely replace ASCII or are there reasons why it's still in use as the primary way to represent text characters?