> the SRS system keeps the memory fresh

Memory freshening can be used responsibly, as part of a balanced mental diet. However...

I saw a paper go by years ago, on someone who seemed to have outlier excellent memory retention. They could tell you what they did on arbitrary days decades past. It turned out they were just an expert on their own life, spending much time each day refreshing memories.

Less extreme, the story of an elderly widower, who would sit out each day, replaying memories of time with his wife. Each like a little dopamine hit, no app required.