Re: No thanks
Microsoft SMB stack is the reference point and the defacto standard IMO. It's fast and stable and makes me all gushy inside. I have deployed systems similar to what you are describing, ether Direct attached or over block protocols, for a long time. Up to maybe 100 TB file system, and millions of files...it's workable if not stellar
I was more taking exception to the statement that similar solutions for SMB exist for Linux as Open Sores software.
But once you get into mixed mode presentation (NFS and SMB), 100s of TB or more importantly, billions of files, etc, anything that looks and acts like a gateway becomes a bottleneck to scaling and ads a lot of complexity. Truly purpose built, scale out NAS solutions exist for many very good reasons.