Technology for rich text formatting has existed for many many decades. It was not a part of Notepad. People using it were well aware of this limitation, and used notepad because that technology was not a part of it.
A non-used feature will still cause unnecessary data-traffic. At the very least to install it and update it periodically, more likely constantly because it will become part of the microsoft telemetry / advertisement profiling / tracking package that is called windows.
You want the feature. I'm interested, too. But I don't want the feature in notepad. I want notepad to stay as freaking basic as possible, because the main thing I (and I think other people too) like about notepad is the incredible speeeeeeed at which it opens on any device because it's "show text" and nothing else.
It's a 356 kilobyte file for now.
I'm mainly complaining it's a stupid ass way of microsoft making their bloatware tracking operating system complete. There is no good reason for them to put this stuff in notepad instead of, again, where it belongs and where 99.000 other features to juggle your texts around have been put before: Word, O365.