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Nodes don’t lose all their work when they reboot following power failures. Battery backups are common.
I don’t share all of your “third world” assumptions, but if I did then I’d argue that bandwidth would be the bottleneck not PC speed anyway.
But the thing is, used PCs are still very fast and one with even 16GB of RAM lets the user allocate, say, 10GB of dbcache which dramatically reduces HDD I/O….
We agree I’m sure that storage IO is the bottleneck we are talking about and that even an inexpensive SATA SSD would make a world of difference. Not sure what that does to the budget but the point is that’s not prohibitive.

How much RAM what dbcache size ?

Maybe, but even Raspberry Pis are crazy right now. Some can be north of $300.
Plus Raspberry Pis are getting to the point of being unusable for nodes. With 8GB of RAM your looking at a solid week or more for IBD.

Nodes don’t lose all their work when they reboot following power failures. Battery backups are common.
I don’t share all of your “third world” assumptions, but if I did then I’d argue that bandwidth would be the bottleneck not PC speed anyway.
But the thing is, used PCs are still very fast and one with even 16GB of RAM lets the user allocate, say, 10GB of dbcache which dramatically reduces HDD I/O….
We agree I’m sure that storage IO is the bottleneck we are talking about and that even an inexpensive SATA SSD would make a world of difference. Not sure what that does to the budget but the point is that’s not prohibitive.

How much RAM what dbcache size ?

Maybe, but even Raspberry Pis are crazy right now. Some can be north of $300.
Plus Raspberry Pis are getting to the point of being unusable for nodes. With 8GB of RAM your looking at a solid week or more for IBD.