I agree that those NAS boxes are a real concern when it comes to backup/restore. But perhaps future is more about VM/Software defined than hardware/vendor specific solutions.
We see a lot a of our customers leaving the "hardware/vendor" NAS solutions to VM based NAS (W2K12/R2 or RHSS), even on huge volumes (they scale-out instead of scaling-up aka "controller upgrade").
They are ok to leave some features to get a more agile/flexible solution, with no specific licencing, no specific antivirus, no specific backup & restore, no dedicated hardware and a greater lifetime.
Veeamizing your IT since 2009/ Vanguard 2015,2016,2017