No OEM wants their aircraft above Vmo. Whether the protection is automatic flight envelope limiting (as described), semi-automatic (most AP systems or At systems wont let you go past Vmo plus "a bit") or manual (various warnings going off when Vmo is exceeded) its always the same - don't go past Vmo.
Why? Because that is the legally certified maximum speed for normal operation. it's the maximum speed where the aircraft has been shown to comply with every single regulation required to be given a type certificate.
What it is emphatically NOT is a deadly cliff edge, past which certain death awaits. in fact, in order to be allowed to publish that Vmo speed, the OEM has done a huge amount of work demonstrating that considerable margins exist at that speed, and has tested the aircraft well in excess of that speed.
To deduce from a speed limit that it must be incredibly dangerous or impossible to go above that speed would be akin to looking at the speed limit on a British motorway, say, at 70mph, and saying "well, obviously they put that limit there because it's certain death to drive at 75mph". Nonsense. It IS more dangerous at 75 than at 70 (and indeed also more dangerous at 70 than at 65 or 60), and the 70 number is to some extent chosen based on an acceptable level of danger, and then used for various design considerations (like the radius of curves in the road, or the strength of the crash barriers, and so on). But until something else goes wrong, people can happily race past at 100mph, with the biggest danger being to their wallets and their driving priviledges.