Some web pages update frequently, so I would need something that can handle that.

I do understand that you seem to be targeting the log use-case of Elasticsearch moreso than the "Apache Solr" use-case.

I would be in passing curious of what about the GDPR makes infrequent deletes a design choice. My understanding of GDPR is that the "right to be forgotten" aspects would if anything require deletions to be inexpensive.