I was doing that but some companies think you are "hacking" if you put the company name in. Like I don't think you can do [email protected] on Facebook.

They must have changed that at some point, since I do exactly this and have no issues. I set up my FB account 6 or 7 years ago though.

I would tell you that my FB email address has that format, but maybe I'd be leaking too much information by doing so....

[email protected] is perfectly usable though.

So I think that was grand-OPs point to a degree. If you can't always do [email protected] there is a change you will forget what you used: Example:

aws vs amazon-web-services vs amazon.web.services

facebook vs fb vs fbook

Or for example I've used Rally the project management tool but my health insurance uses a (terrible) "rewards" program called "werally" but it's ALWAYS referred to "rally". It can get unmanageable.

Now I use 1Password to track all of this stuff which works well so I think there are solution but I do understand the grand-OPs point.