I recently moved all of my NAS needs to a UNAS Pro and just have an old Intel Bean Canyon NUC in the closet running apps on top of it. Portainer is a reasonable docker frontend, though not perfect -- but more importantly, the storage is just separated from the NAS entirely. As long as your NAS can serve files to a secondary server, you the sky is the limit with what you have actually accessing the files and doing things with.
The particularly jarring thing in this article is the SMB concurrency limits. Those effectively gate your scalability in terms of storage. Even more than forcing their own drives to be used, the concurrent user limit is a clear enterprise upsell: charge people to get a higher limit. The byproduct, of course, is that elaborate home lab connections or setups will also be hit by this.
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