Memory after dozen micro strokes

My uncle had a highly stressful medical issue last summer and after that was dealt with he had about a dozen micro strokes. It took several weeks to figure out what was going on, during which my uncle forgot how to use a fork and knife, talk, the passing of his sister...

Thankfully he's recovered so much he can carry a conversation, handle personal hygiene, feed himself... however, his memory seems to be somewhat lost in time. he seems to forget recent events longer than six weeks ago. for example, going places, moving to a care facility. With stress, symptoms worsen.

Do you think there is hope he will further recover mentally? Or should we brace for a 'big' stroke?