Yes, if you have the paid ChatGPT Plus and the feature is enabled in your settings and you are using GPT-4 then you will get 4x the context length, which equates to 4x the in-chat short-term memory.
I do play plus. What feature you are referring to?
as of now, a lot of times when I continue a conversation, it forgets the suggestions it did before, for example
Bt checked just now and I see Dall-E and advanced data analysis, for what is worth
Are you referring to something other than the fact that the chat can exceed the context window length? Nothing will ever solve that issue, unless context windows become virtually infinite.
Lately it's made some really bad mistakes, like forgetting which programming language we're working in. I have seen some suggestions this could be related to custom instructions messing with chain of thought, so that's something for people to be aware of.