I believe building reliable, internet-scale services on such hardware is impossible. Having single bit errors, which are hardly rare [0], silently propagate is a recipe for disaster.
I applaud Scaleway for the foresight of building custom, sale-out hardware, however, that this is their second effort and still lacking in ECC use is very, very, disappointing.
I would love to use this hardware, it's almost the perfect design, but it's tragically flawed as is.