[opportune]

What about first-party SaaS? Those can also be big features that bring people to some cloud providers. Not all SaaS requires you to trust your data/availability to some random vendor. Of course those first-party SaaS aren't typically suitable for lift-and-shift by their very nature, and they can still have some rough edges, but IMO you can expect them to be almost as reliable as IaaS

[grantlmiller]

First-party SaaS meaning things like RDS, DBaaS, queues, LBs etc? Most of that I would sort of put into a IaaS controlled PaaS, rather than true IaaS SaaS. Yes, these are generally higher on the trust spectrum as they don't involve additional vendors accessing/managing/storing data.

[opportune]

A major one I'm thinking of is BigQuery, also of course all the various db/queue solutions outside of your typical S3 clone as you mentioned. That would make sense viewing them as platforms though