Hi,
many thanks for your question. Well, in generell RAM will be always faster than disk access. If you are ok with speed, you can leave it as it. On a SSD it might not have that much advantage compare to a HDD but it could as well reduce r/w operation to keep your SSD healthy.
https://dietpi.com/forum/t/dietpi-arr-to-ram-link-sonarr-radarr-lidarr-database-files-to-ram/3120/1