I hate to say it, but depending on manufacturers for this kind of stuff will always inevitably lead to these kinds of situations. This is why I always buy OpenWrt compatible routers and DIY my own NAS.
Over the years, I've experienced:
- Netgear refusing to patch bugs like their IPv6 firewall essentially letting all traffic through on the R7800
- QNAP shipping NASes with Intel CPUs that had clock drift issues so bad they essentially bricked themselves. They then refused to provide any kind of support for them.
After that I basically said, fuck it, I'll DIY my own and have been much happier ever since. If you have the know-how and the time, DIY is the way to go for longevity.