As with all things, it’s all dependent upon the details. OS, Bios, chip, they all can have an impact on battery consumption while sleeping. The linked (from the post) Reddit thread has many suggestions on how to fix this, but for the author, I don’t think it was ever resolved. The author of that Reddit post was also shocked.

The reason why it works well for Apple is that they control everything. There are limited numbers of parts they have to support, so they can make sure it all works.

In the PC world, there are many… many variables, even from the same OEM. It’s a legitimately hard problem and manufacturers aren’t particularly motivated to get it to work better (particularly with Linux). In fact, at this moment, there’s another post on the front page that talks about this exact issue: https://news.ycombinator.com/item?id=45288440 . It is about debugging an ACPI bug that has existed for years.