If you had to do it again today, what would you do? Especially interested in this part: > If you have realtime data ingestion, you will also have to build too

If you had to do it again today, what would you do? Especially interested in this part: > If you have realtime data ingestion, you will also have to build tooling to re-ingest older data that has changed or needed to be amended. This will end up looking like a 'lambda architecture'