Does Google (or any of the other cloud vendors) audit/review the actual source code of packages used in the images? such as apache, nginx, openjdk, etc? or do they just run a scanner that test for known vulnerabilities?
If you actually read the EU proposal then it does not require filtering upon upload, it seems fine to perform filtering upon download. Secondly the proposal states that the measures should be proportional, which might mean that code is not affected in any significant way.
I think this is because people perceive multiple monitors as giving a better overview, regardless of switches being available at a lower cost, which has caused the market for switches to become a niche market.
Running multiple containers on a single core or hyper-thread (which seems to be the primary way that containers are used), will obviously have a lot of non-cooperative context-switching, and will therefore have a very significant overhead compared to a solution that takes advantage of cooperative multitasking and cooperative context-switching.