What is another name for HTML files?

Or to put it differently: When was the last time you sent a HTML file over eMail or some other way except sending the URL to a website?

Also, to use text fragment links you need to have the page hosted on a webserver. Can't send links to local files since you don't know the full path it will end up under on the local file system.

So if you just want to send a file and a reference to which part of the file you are talking about, you now need to either host the file on a webserver or have the recipient rewrite the link to include the path where they ended up putting the HTML file. Talk about baggage here.