From what we've heard from our customers no one is doing this (or wants to do this) and would prefer to just a flip a switch and have Vantage handle it on their behalf.
Also, even if they are untagged, it's not like we need to tag them by hand, AWS Resource Tagging API works nice enough, and not every resource is costly that we need to tag them by resource-level.
I support what you are doing however there are too many companies working CUR data in S3 and none of them is good enough and neccessarily faster or more useful than Cost Explorer. Just wanted to understand what you can add on top of it, apart from automatic tagging? part.
We've heard from customers that some top issues they have with cost explorer include (1) lack of visibility into K8S workloads (2) more complex filtering around creating cost reports and (3) more effective tools for chargebacks/showbacks. All of these are on our roadmap - in addition to supporting other clouds (Azure, GCP) and other cloud services.
Out of curiosity, what would you want from a "better cost explorer" service for your organization?
Chargebacks in AWS is very complex, i.e in cost explorer net amortized cost vs unblended cost is hard to understand for an average user. It'd be nice if you can have some clarifications on it, what does even amortized mean etc.
We use Cost Explorer API to identify anomalies. Even basic statistics works sometimes. But there is also new native feature that is good enough for us, so we removed that. But it was a very sensitive topic, i.e our S3 usage is steadily increasing %.x per month. Trend & seasonality analysis is a must.
Sorry for my quick and dirty English. This is a hot topic for me and I get excited.