Without getting into specific rejections, I think it was formative to find that business leaders would always be more keen than technical leaders ... to hire someone to learn technical skills on the job. The net result of these experiences is that most of my programming experience was developed in my own time, at my own expense.
It's been interesting, going from VisualBasic, to spreadsheets, PHP, JavaScript, CSS, Erlang, Haskell, Docker, Ruby, and recently on to Shell Command Language. That's been about ... 6-7 FTE years spread out over an 18 year period.
- Being a generalist, I'm probably most knowledgeable about spreadsheets ( in-cell array syntax is rarely discussed, but quite functional in application ).
- Having spent some time in web, I learnt nearly every language feature of JavaScript around 2020 - no one should care ... as it is a really horrible organic language, though not as bad as SCL.
- Erlang is probably my favourite language and runtime.
- I will probably never make time to learn Haskell properly, as I should be moving to C within that level of concern.
- I will probably try to keep abreast of web, since it grows not too quickly and is still a nexus of the ecosystem ... my fun-allocation is currently figuring out how small a codebase is needed to write a reference implementation that covers as much of the web spec as possible.