Impacts of Deleting/Reindexing Index and Restreaming Data

Hey had a question about Index management and the impacts on deleting an index instead of reindexing.

For example, I want to change a field type on a specific field. I could use the reindex operation and send in a new mapping with a new index. Then stream all my data over to populate the new field on all my docs.

But, if I just deleted the index and restreamed the data, I would get to the same place, but at least I still have the same index.

But I’m curious, other than downtime with the index (there could still be down time since I would need to restream the data for the new fields). But is there other negative impacts with deleting the index? like stats on search, keywords, etc. Or are there more reasons to choose reindex over deleting the index.