Usenet servers had no web UI since the web was not yet invented. They ONLY provided an API and the presentation layer was done completely by the client. There were dozens of client programs people used, maybe 100s. Clients handled all features like subscriptions, tracking read articles, boosting or blocking topics or users, etc. So in that regard it was much more private for users. The servers were computers 1000x slower than a modern mobile phone. So yes, Lemmy seems overbuilt.