Yes I’m familiar with that trick. Although I don’t even need it as I run my own mail server, so <anything>@MYDOMAIN.org will get sent to me, so I already have the option of infinite inboxes.
I know that there are several workarounds which could work. However I’m much more interested in n8n supporting mailhooks natively, for the reasons I explained in Built-in mailhooks for triggering workflows by sending mail.