I totally understand that there may be a majority still considering this a bad practice and thus keeping it disabled by default in production seem ok. But there could at least be an option to enable it for people who want to, no?

Not being cancelable makes validating dialog content impossible - eg a login dialog or anything that takes user input. Of course, it's easy enough to get around - but I think this should be a requirement of a dialog.

[link](url){:target="_blank"} Works for jekyll or more specifically kramdown, which is a superset of markdown, as part of Jekyll's (default) configuration. But not for plain markdown. ^_^