[penagwin]

Unless you have a datalink over 1Gbps (and iCloud can actually saturate that link) the SSD isn't going to bottleneck it either way.

[pier25]

actually 1GBps

[penagwin]

Even better! So you'd basically need a 10Gbps connection. I highly doubt many macbook air users have a 10Gbps connection, and are connected with a thunderbolt -> ethernet. I also doubt you'll find many cloud providers that can saturate that anyway.