The entire reason notepad still exists is that it edits and saves to plain text files. I do not see how an opt-in spellcheck or autocorrect interferes with that -- though honestly, I don't see who the possible customer is for those features either. It's a waste of time, but it doesn't undermine the application.
What reason, honestly, did Wordpad have to exist? Who was clamoring for an RTF editor but thought any of the free the full-featured ODF editors or online service a la Google docs were not up to the task? Seems a lot of people are salty that Wordpad was dropped, but I just don't get who was using it. This from someone so frustrated and annoyed by pretty much all WYSIWYG doc editors that I've lately been doing more stuff in latex despite how irrational I know I am being.