Offchain transactions are basically measuring nothing. Anyone can record an offchain state change of 10 trillion per microsecond since none of it happens onchain.

The benchmark to beat for a distributed horizontally scalable infrastructure is Shardines - already shown 1M+ TPS - reproducible over 1.5 years ago.

https://medium.com/aptoslabs/shardines-aptos-sharded-execution-engine-blazes-to-1m-tps-71c5f9b8bf60

Also with MonoMove 10x-50x+ more performant than before, pretty much unbeatable.