I just upgraded to the top M3 Max CPU from the top M2 Max CPU.

I benchmarked several test suites to compare the machines. The test suites for two different Rails applications were around 10% faster on the M3 Max. A test suite for a Go web application that does significant integration testing in parallel (i.e. multiple complete stacks of database, application server, and browser) improved by around 20%. The extra P-cores help. Miscellaneous other tests and benchmarks were around 7-10% faster.

Didn't notice any difference in normal usage.

So not likely worth the upgrade unless your workload can really make use of the extra cores.

Programming Pearls by Jon Bentley

If it is too hard you’re doing it wrong.

You can use a type that marshals the Go zero value to database null and vice versa. https://godoc.org/github.com/jackc/pgtype/zeronull provides a UUID type with that behavior.