When is Netgear going to refresh their ReadyNAS range?

There are several where the hardware is fairly new, though not radically so compared to older models.  The 400, 520, and 620 series specifically.  Unfortunately, many are currently unavailable in the supply chain. A user recently posted that was due to limited profit due to tariffs, but Netgear has not announced that.  Many have assumed the supply issue is more COVID related, with manufacturing and transportation being used by more important commodities.

The Debian Linux upon which the OS is based is getting a bit long in the tooth, having just been removed from long term support in June.  Netgear does not normally make OS update announcements in advance, but I would hope they are working on something based on a newer Debian distro.  Of couse, that's a major change, so expect a longer beta period when it does occur.  At this point, I would not expect that update to be incompatible with older OS6 NAS except maybe the 100 series due to memory and CPU limitations.