Refrig

I missed the pedantic part

And I totally agree with you as far as leak testing is concerned. We must all leak test to the best of our abilities but there comes a time when we must say a system is leak free (at that point in time) and continue to charge/commission.

No system can be 100% leak free as expansion/contraction/movement/people walking on the pipework, etc, will/may cause it to leak. We've even had discussion on here about sub-standard brazing rods allowing the gas molecules to escape through the braze

All we can do is our best.