Updated "hardware" recommendations?

[Jamshid]

Just wondering if there is an updated doc similar to the very helpful 2.3 guide

Hardware | Elasticsearch: The Definitive Guide [2.x] | Elastic

It summarized memory, disk, and network configuration information and is probably still relevant but I can't find a modern version of the page.

It still gets referenced in posts like:

I/O scheduler for ES 7.0

We are using ES 7.5.0 As per the documentation, selecting the correct i/o scheduler should optimize the ES performance. In our system when I checked in /sys/block/sdb/queue/scheduler, I could see 3 scheduler options noop deadline cfq We are using azure blockstorage in our system. So which scheduler should be best for our configuration?

I guess it's spread now among pages like this:

Tune for indexing speed | Elasticsearch Guide [7.15] | Elastic

https://www.elastic.co/guide/en/elasticsearch/reference/7.15/tune-for-search-speed.html

Merge | Elasticsearch Guide [7.15] | Elastic

Important Elasticsearch configuration | Elasticsearch Guide [7.10] | Elastic

Maybe the I/O Scheduler info wrt SSDs is not relevant with modern Linux?
Can't find the recommendation against cross-datacenter clusters.
Also don't find current recommendations like "prefer medium-to-large boxes" or around number of CPU cores.