Thanks for the link.
In the nine-plus years I've been here, HEOS hasn't been mentioned once. A quick search of the forum brings up exactly one hit - yours.
Don't take me the wrong way. I'm not arguing with you. I won't use it as I'm not an audiophile - simply a music lover. But if there's been no mention of it here, no requests for support, and it was introduced five years ago, it's definitely for a niche audience. And therefore more a user-developed plugin, than something hard-wired into MB.