[rollschild]

Of course I did. I DM'ed him on Twitter with no response. Then I commented under one of his tweets and he did respond. He mentioned it would be complete by Aug 2023 (this was before Aug 2023). Some time this year I commented under one of his linkedin posts asking for update - no response. There are multiple comments from other users on that web page I linked above - most of them had no replies.

Of course he's been busy. Everyone is busy. But charging $200 (or $100 with coupon) for a course which is delayed for more than 1.5 years and still has no sign of completion is another story.

[zerr]

Did you ask for a refund? If you were refused, you can proceed with a chargeback procedure with your bank.

[rollschild]

Not yet. I'm willing to pay for stuff like this. I was reading Tim's Rust in Action at that time and I liked the book so when he announced that he was starting such a course I immediately singed up, although the price was a bit crazy. I got the coupon code from a guy on Reddit so that's pure luck. I am really willing to pay for other peoples IP. I am still hoping that one day he could complete the project but before that I've got some other projects to work on.

Side note: I've finished Build your own Redis in C/C++ (https://leanpub.com/build_your_own_redis) and it's pretty decent. The title of the book is a bit weird since it's almost 100% C++ so I don't know why they put "C" in there. But it's a pretty decent book (and reasonably priced).