To my understanding, RAM plus mixes system storage in the RAM soup, and since it is a lot slower than RAM, the more system storage you select the slower your phone will become. It would have been ok to have if the system was capable to prioritize actual RAM cells and only use storage GB in case of RAM overflow, but the moment you allocate storage as RAM the system has no way of knowing which is which, and cell selection is random.
To my understanding, RAM plus mixes system storage in the RAM soup, and since it is a lot slower than RAM, the more system storage you select the slower your phone will become. It would have been ok to have if the system was capable to prioritize actual RAM cells and only use storage GB in case of RAM overflow, but the moment you allocate storage as RAM the system has no way of knowing which is which, and cell selection is random.