We're bullish on the ELT use case and think of virtual tables as "Data Rainbows" - structured, ephemeral access to cloud data. I spoke about this concept for YOW Data (https://youtu.be/2BNzIU5SFaw?t=183). Still structuring our thoughts here, so feedback and ideas would be greatly appreciated.
Disclaimers: Steampipe is open source. I'm a lead on the project. I can't stand listening to my own talk.