I have been using the RS1219 for about 6 months and am satisfied. It's much quieter than the big Synology Diskstation in 19" rack format and also much shorter in length, so that smaller/shorter 19" racks also fit. The processor is a bit weak on the chest, so if you use it in an office environment with many users, it could be tight depending on the workload, especially if the periodic raid/data scrubbing is also running in the background.
Regarding your assumption of "SSD longevity" in a raid array, I wouldn't be so sure and would research this carefully if I were you. The reason is that Synology offers 2 special rack stations with a special file system "RAID F1" for use with SSD, namely the models Flashstation FS3017 and FS2017. I recommend that you study the Synology white paper on this specific topic (available on the respective product page).
https://www.synology.com/en-global...
I am only quoting from Synology FS2017 website:
Due to the peculiarities of SSD and RAID technology, a common challenge lies in how to prevent all of the drives from failing at the same time because of the evenly distributed workload. RAID F1 alleviates this problem with a specially designed algorithm to unevenly distribute workload to drives, enhancing the resilience of the storage pool and ensuring your data remains safe.
Here is an excerpt from the Executive Summary of the Synology White Paper on this topic:
However, SSDs have a finite number of program-erase (P/E) cycles. If traditional RAID is used for random
write workloads, multiple SSDs will probably be worn out and fail at the same time,
resulting in a crashed RAID and data loss. Synology RAID F1 algorithm tackles the
problem by writing more parity bits into a specific SSD to avoid all SSDs from being
worn out at the same time, and making one system-assigned SSD to be worn out in
the first place. With this approach, RAID F1 will be very unlikely to crash as data
are unevenly written to SSDs. Thus, Synology RAID F1 enhances the endurance of
RAID compared to other RAID algorithms, an important concern for enterprise flash
storage products.
Personally, I have no experience with Synology and SSD for large data volumes (50 GB+). In that sense, I can't give you a recommendation, but just wanted to make you aware of the topic & the potential risks.
Have fun
