It’s definitely doable but can take quite some time and resources, so it might be a fit only for archiving old data. Eg for 422k likes it would be several hours and up to 1TB of ram which would cost $6-8 per hour. The cost can be justified if the events are quite sensitive but def not for ordinary posts:) We do expect 10-100x perf improvements in the nearest future though so it might become viable at some point