This happens when there's something that is more important than being the cool manager that's following the latest hype.
how much historical anecdote do we need to recollect before it's realized that the finance industry as a whole, but most especially the stuff that is US-centric, refuses to change course unless they're: 1) unprofitable 2) regulated.
the only reason they moved on this was because it was noted somewhere by someone that matters that the risk imposed could cut into profit or impose a regulatory hammer.
those are the only possible reasons for corporate movement in finance.
It could also be unprofitable due to the speed-up factor the AI is providing to the workforce being lower than the costs.