Following the advice given on this forum (thank you), I have been able to reduce from August to now, shard amount: From 4028 to 3317
That being said, I feel this is a high number.
There is a document that says how to calculate what the ideal size should be but I cant seem to find it and if I remember, its kind of a few years old (I might be mistaken)
If your cluster (or node) is under pressure and you can't reindex, you can always start to remove manually the older indices without having to wait for 180 days.
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