From someone who uses GTM environments, a this would definitely be helpful. Perhaps hidden away in some advanced configuration section where users can paste the implementation code in a text input block and that override the GTM-ID field.
I understand the need to keep things simple for the majority of all users but being able to use the environment feature in GTM is something I’m definitely interested in. Sure I could install GTM by hand to templates but the beauty of your plugin is how simple it is to install and you’ve already built many dataLayer hooks so grabbing that meta information is so easy…its really hard not to use your plugin when it saves so much time ??
But yes…environments is a feature request I think would get enough use to make it worthwhile.