Underwhelming, mostly "luxury problems" other people don't have. He can probably fund a bunch of startups to tackle most instead of complaining. You know what

Underwhelming, mostly "luxury problems" other people don't have. He can probably fund a bunch of startups to tackle most instead of complaining. You know what I miss most? While there are plenty of online courses, some even for particular specializations, noone offers "synthesizable" courses targeted at arbitrary special fields with arbitrary preexisting skills. For example, I want to learn everything about state-of-the-art battery production (e.g. how factories operate, what the scaling issues are etc.). I have a background mostly in IT, physics from school, strong in mathematics. I should be able to choose this specialized topic and then "add" prerequisite courses until I'm confident that I can build on my existing knowledge and get exactly what I need to know to become proficient in battery production. My current choices are either to study physics at a major university and try to find courses that cover my target topic to specialize towards the end (realistically, I'd have to read 100+ publications to cover recent advances), or to find books on the topic and whenever I feel I lack knowledge to understand a book, other books to cover these holes. Very difficult, trial-and-error and slow. Or I could hire a personal trainer(?) proficient in the field (how to find?) to get me there. Neither of these seem very attractive and efficient and having a flexible online course system for this purpose would really help. Any takers? Don't you want a simple, effective way to become proficient in a particular field without wading knee-deep through useless material for years?