i had both. Original file to keep it. resize to upload to net. Eventually U can del off the resize because you still have ur original file. Whenever you wanna resize, just resize it. Its better then having the resize and yet you cant get back the original file.
Originals, whether good or bad will be burned to CDs and kept, (like your negatives), good ones will be kept in HD for easy retrieval, resized ones will be kept in a separate working directory and sorted by subject.
Is this a question on what other photographers do, or is this a question you wnat to know so that you can make up your mind?
Let me ask you a question first. When you were shooting with film, I am makeing a leap of faith that you did in some point of your life, do you just keep the prints only or do you also keep the negatives?
For me I would keep both since I might use it later on for some other purposes. If I need it for the web I would resize and lower the resolution. Sometime it happens that I need to print the pictures so I will use the original for printouts.