I kind of agree. IOTA has established infrastructure, whilst QRL is trying to get exposure. Yet, if quantum computing hits town in the 3-4 years predicted, QRL could be a necessary solution. Quantum computing has the potential to undo all of the Proof of Work cryptos on the market, and could make hacking much easier.

The way I understand it, Proof of Work coins can't be upgraded because mining fundamentally relies on solving difficult problems. But quantum computing will make it so easy to solve such logical problems that the entire coin supply could be mined in mere moments. So all PoW currencies will be effectively obsoleted or at least severely devalued.

As for currencies like Ethereum, which are proof of stake, I think there may be issues with the coding that prevents them being upgraded with quantum resistance. Or something like that - I'm not too knowledgeable on this. This is why a new coin will likely be needed. Whilst the IOTA team have time to improve upon their project, it really is a question of whether there is enough focus on quantum resistance with this project.