A good list, thanks. I’m already using Udemy and just signed up for Coursera.
As for Microsoft-centric being a con, I am NO fan of Microsoft, I worked there ten years and in my last (as in final) gig they made me pair-program and it did me lasting harm.
However I am currently working in another stack; JavaScript, Django, Python and it absolutely stinks. Almost a month in I am still figuring things out; by this point in ASP.NET I was productive and contributing. First time in a quarter century I can read code and not able to figure out what it’s doing. The connections are not visible. JavaScript feels like a toy.