As to SSD based NAS solutions or rather NVME based ones I found some examples:
https://www.storagereview.com/review/qnap-tbs-464-mini-all-flash-nas-review
https://www.servethehome.com/a-quick-look-at-the-asustor-flashstor-6-fs6706t-nas
By the way: both seem to have fans. Not sure how noiseless...