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RE: iExec will be supporting Intel SGX (Secure Enclave) promising to allow for private software execution in the decentralized cloud
iExec relies on XtremWeb-HEP, a mature, solid, and open-source Desktop Grid software which implements all the needed features : fault-tolerance, multi-applications, multi-users, hybrid public/private infrastructure, deployment of virtual images, data management, security and accountability, and many more.
But not privacy of the data. All of that is fine but don't expect the computation to be anything secret or private.
Lei Zhang in my opinion is basing his choice on an assumption. That assumption is that Intel will get it's act together and release a future version of SGX which is not vulnerable to the current attacks which render the current versions of SGX insecure. So yeah of course it's a bet on Intel, but I think iExec needs a backup plan because it's not wise to pin all bets in one company.
I even tend to agree that sooner or later Intel will get SGX right, but this will be in a future chip which isn't released yet. iExec will not be able to guarantee data privacy with current SGX in my opinion.