Gopher has split between directory/text. Gemini does not.

Gemini is not so rigorous with formatting as gopher; in Gopher, the different clients can format the paragraphs and do their own thing.

The TLS is the most problematic part, for me; as Gemini decided to go with TOFU, which is IMO horrible in web-like setting; and the TOFU itself is vaguely defined and the specs basically says "client and servers can ignore it or whatever". But it's simple indeed.