Except that `simultaneously` is acknowledging the comment I replied to whilst making it clear that what I'm noticing is different to that, but not negating their comment.

What you've demonstrated is ableism in action. Congrats, you grammar nazi'd an ADHD autistic who hasn't had their meds trying to tap out a message on a virtual keyboard in a throwaway remark on HN. If this is what the future is like then God help us all.

Simultaneously is redundant with "also": "I'm also noticing" and "Simultaneously, I'm noticing" both imply a reference to an external thought. You could drop 'also' instead of 'simultaneously' if you're worried about ambiguity in terms of the nature of your acknowledgement.

ps: I tapped out a message on my virtual keyboard, and didn't take my ADHD meds yet either. I guess where we differ is that I didn't use my condition to attack anyone for ableism just because they didn't agree with me.