Meanwhile TextEdit on Mac always rendered HTML. Which seems useless until you realize it can also edit and save as HTML. So there's casually a wysiwyg web editor built into macOS that idk how many people use.
Spell check is fine - highlight misspelled words, offer corrections when asked. What's incredibly harmful is autocorrect, as it slowly but surely causes vast majority of computer users to become partly illiterate. And nobody gives a damn, because hey, we're efficiently saving time!
It didn't cause me to become illiterate, it caused me to give up using it and find something else since it was "correcting" a lot of things that were correct to begin with, and going back to re-change them became a chore in the only 10 minutes I used it.