Dislaimer: I work at the company that makes Teleport.

Just to clarify, this blog post was about the updates in this release which include a lot of UI changes (particularly in the Web UI).

However, Teleport works with whatever UI you would typically use SSH with[0]. The WebUI is an additional "feature"; it's not the only user interface.

[0] The use of SSO is another feature that does generally require a browser based auth.