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With this in place the bottlenecks have to move to things like network, block serialization, validation parallelism overheads… Development time would be better spent on optimizing those...
I find skipping amount validation more concerning (potential inflation bugs)
It’s basically free so it should do that for sure. That said, there are so many lost/abandoned coins that if miners (with developer collusion) create a chain that unjustly rewards them, they’ll just steal coins rather than inflate.