I'd agree with this
If you only ever played a piano and try to pick up the guitar or trombone or whatever, there is a learning curve - and productivity will take a nose dive until at least a certain level of skill has been attained
the same with modular - it's like just like learning a new instrument - except this one is often constantly evolving
"some of the best base-level info to remember can be found in Jim's sigfile" @Lugia
Utility modules are the dull polish that makes the shiny modules actually shine!!!
sound sources < sound modifiers < modulation sources < utilities