My synology is doing so much more than being a NAS. Its running a 3 camera cctv system, running transmission, NZBGet and running TeslaMate collating data from my car. All that and still streaming 4k video to the TV. Some nights even steaming 1080p to two different TV's at the same time.
You do pay for synology stuff but its very good. Last year I scaled up my hard drives by dropping each out and letting it rebuild four times as I repeated with each new drive, then expanding the whole volume onto the new space. Took 4 days in the end but all within DSM and very easy to do.