The idea was not to play whole pieces in strict time but to improve my internal pacing of long pauses.
I still think its a legitimate, albeit isolated, example of a genuine improvement gained.
I've started writing my comment several times. Eventually, I've decided to say this:
You and I have attended/gone through some Academic Education Music School.
We both know there is NO requirement (zero, zilch, nada) of playing ANYTHING along with the metronome/click.
Jeff Berlin has Mastered the Electrical Bass Guitar. His teaching method complies with the Academic Education requirements. It's all about learning and mastering the instrument. The word, Groove does not exist in any Academic Educational manual.
The same thing about Vitamins. I know your answer on Vitamins, you know my answer on Vitamin supplements.
Somebody says, "The vitamins really really helped (are helping) me" - It's me, and I take them on a regular basis.
Somebody says, "It's enough to take just multivitamins" - I, kind of disagree with it.
Somebody says, "Vitamins are important but it's OK just to eat Healthy food and get those vitamins ONLY from food", etc..., but...
You will not find ANYWHERE in the Academic medical books written statement/s that you, as a doctor should treat your pneumonia, stroke, heart attack, etc...patients with Vitamins.
I've been using Metronome/click for decades. I'll will use when I need it, but...
It's not in a Standard Academic education manual.
Did the Metronome/click help me.
I truly believe that the Metronome as a Calibrator helped me to BETTER internalize (!) various subdivisions, various patterns, various fills, various runs, passages, etc...
I do not try to internalize some Abstract Tempo. In my case, the metronome has helped me to achieve DEEPER time and nuanced-based articulation of this or that measure, riff, pattern, etc... which is NOT required in Classical Music/Academic Education.
What's more. The Academic Education helped me to start "specializing" in my narrow vision of my musical idiosyncrasies.
I don't see any issues with Jeff Berlin's solid academic learning of the Instrument - the electric bass guitar.
That solid foundation would help any musician to go this/that/other ways while pursuing their own visions/ideas/etc...