As usual, redditors can’t read the thing they linked to.
While you can still use non-supported drives for storage, Hardwareluxx [machine translated] reports that you’ll lose several critical functions, including estimated hard drive health reports, volume-wide deduplication, lifespan analyses, and automatic firmware updates.
So the headline is false, you just don’t get access to a bunch of functionality that relies on drives predictably reporting to the host and being specific types.
Oh, and it only applies to the “plus” line.
I don’t even like synology and this is pretty indefensible writing…
Tbh it probably reflects coming shake up in storage where hybrid devices and race to the bottom thinking take over.