If those hosts are using Redis to cache transients or DB queries there should be no problem. Only if rendered HTML is cached and sent to all users might it be an issue.
I had briefly considered forking or modifying the cache plugin I use to keep separate cache files depending on this setting, but didn't end up doing that. For cache plugin authors it wouldn't be too difficult though.
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If those hosts are using Redis to cache transients or DB queries there should be no problem. Only if rendered HTML is cached and sent to all users might it be an issue.
I had briefly considered forking or modifying the cache plugin I use to keep separate cache files depending on this setting, but didn't end up doing that. For cache plugin authors it wouldn't be too difficult though.