If we put the DBs into elastic pools, then I guess this issue will be over.. Keeping a single web DB can handle the situation. but again your point is correct. Should have multiple web dbs and solr slave for different CD web apps.

This one I believe for UAT env, not prod. Even though, can you please highlight the exact issue on point #1? Happy to learn. :)

It is more similar to Sitecore 9 in terms of questions. Only a few things are extra on containers & serializations.

The client has the demand and in their current system, they are using the same.

@MichaelWest, it is very common to upload huge files in DAM. Those are created for this purpose I believe.

@Mark Sitecore Content Hub allows files up to 200MB, and I have to upload a 5GB file. The blob storage SaaS URL CH is providing is, can be accessed for 5 mins only. Within that 5 mins, I was able to upload 700 MB file only.