Can you be more specific? Like which model you mean?
AFAICT all the SiFive products that are available to purchase and have workstation-ish amounts of RAM require boot blobs. I would be happy to be wrong about this.
Apparently there was a very limited run of dev boards for which no blobs are needed, and then they promptly discontinued that product and replaced it with a (confusingly-similarly-named) blobbified product that you can pre-order via mouser (listed as "backordered, no ETA"). This product is already marked EOL which is not encouraging.
I was just referring to their latest dev boards, which people have put in standard mini-ITX compatible cases, plugged in GPUs and used as workstations. Zero idea what blobs this requires. For eg:
I hardly stumbled into this thread, I was the one who posted it to HN.
I am definitely not hyping anything, least of all SiFive.
This subthread started with the need for RISC-V workstations, I simply pointed out the closest thing to one of those. Of course I didn't mention the firmware situation, which was a mistake, but I also didn't know about the situation.
They're the "closest", but not remotely close.