Hating hosts file?

Sometimes I found that it is pretty annoy to keep editing the hosts file to add a new development domain on my local machine and a colleague told me that there are several domains (and their sub-domains) that automatically loop back to 127.0.0.1 (localhost), for example, 42foo.com, localtest.me, lvh.me, etc.

I personally like localtest.me as it seems more logical to me. So now when I am developing a new site, I could use something like newsite.dev.localtest.me directly without adding an entry in hosts file.