They moved from Wapping to London Bridge where they mainly did it all online.
I went there once after they moved, and they told me that guys would come in the shop, try out a bass and get it cheaper online.
I would say discipline. Cliff Williams fom AC/DC is known for his simple 8th note power basslines.
Many people (Myself included) tend to get bored and start embellishing and overplaying when they dont need to.
It takes discipline to play whats needed without over doing it.
Well, one day this rather odd chap hopped into the office. He'd been to see virtually everyone in the business and been shown the door. He asked to see MY door, but I wouldn't show it to him
Oh Deary me, Its getting to be a right Tango In The Night this is.
https://www.rollingstone.com/music/music-news/lindsey-buckingham-sues-fleetwood-mac-over-dismissal-from-band-736063/
I have a 2008 MIA P bass. It is a well made quality instrument, but it did have a kick in the neck.
Once my guitar tech sorted it out out it was great.
I dont know what the newer ones are like with QC but that was my only gripe.