Is it necessary to be running 7.17.28 before upgrade to 8?

Is it necessary to be running Elasticsearch 7.17.28 before upgrade to 8?

An instance of Kibana upgrade assistant doesn't say anything about having to upgrade from 7.17.x that it's looking at. I can't find any documentation which explains version requirements before upgrading, but I'm sure I've seen such in the past about previous major version upgrades.

See these docs:

To upgrade to 8.18.2 from 7.16 or an earlier version, you must first upgrade to 7.17 ...

Technically you don't need to go all the way to 7.17.28, any 7.17.x version will do, but 7.17.28 is safest.

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Thanks.