Have any of those networks had a stress test? Ardor, Nem or Pascal? I don't think I seen any testing done on these coins. Bitshares however has tested their max TPS and you can see the test running live. Although, BTS doesn't do smart contracts. So there is that...

I think the DPOS coins will do well with scaling, Lisk and Ark are two that I know of. I'm sure there are others out there as well.

Maybe its time for Ethereum to go DPOS until they figure out something better.

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Conclusion
Being able to scale to 100 TPS is a great achievement for Nxt, however we are not stopping here. For Ardor, we are planning to invest a lot of resources into load testing and scalability to make it an even more scalable blockchain solution.