I love Envoy. Even if when it was new it was still a bit behind the curve of AppleTalk and Windows for Workgroups. But it's of that era - a generation where people still used proprietary transport layer protocols instead of only TCP and UDP. At the same time it was still IP based and therefore could share layer 3 with other stacks without clashing with each other. Nothing hackish about it at all.
I loved how well designed it was for the Amiga architecture. Services weren't daemons in the unix sense, instead, like all things amiga, they were shared libraries. There are same great examples of services that extend it's functionality on aminet, like the conf and talk services (source code available too).
It's correct to say that today in 2024 we would likely just use TCP/IP based services, and similarly that no one needs a LAN printer server - chances are any modern printer is its own server or accepts direct wifi print jobs, while cloud drives replaced peer to peer file sharing.
It's a shame Heinz is such a prick about making it available one way or another.