That's why you want to add blur. I also don't understand unblurred transparent terminals.

Very simple actually: don't use 100% transparency.

Just use something like 80-90% opaque (10-20% transparent) and use the background color as black so it just dims whatever us behind it.

You can have both function and form.

In school I had a physics teacher who thought it was a good idea one day to use whiteboard markers on the glass windows instead of the whiteboard. I didn't learn anything that lesson.

That’s the neat part. You don’t.

Simple: only the out of focus apps have opacity set to 85-90%, the focused app is always 100%. Easy.