I think there's a different angle to this that I've been trying to exploit. unknown bugs
I travel most days by bus (I hate cars and my motorbikes come out in the summer - plus it costs me less than £50 a month to go anywhere within 10 miles and my daily commute is less than 10 minutes) - but working for a company with somewhere between 1100 and 1500 employees out of a working age population of around 60,000, we get a lot of people on the same bus to work.
These are a goldmine of unknowns. I can sit next to a person who uses the stock control and despatch systems that i TRY to keep running.... i have profiler traces, run all the reports etc etc... but when the guy on the bus tells me that the stock system broke for 20 minutes today (dont ask) - I asked him why no-one had reported it....
his response "we're so used to it breaking we've stopped complaining" - these are really valuable unknowns that we need to start knowing. my personal opinion is that getting this info is more important than sending all of our teams on MVC or SQL2019 training