For me the biggest issue is that Apple went too far in trading utility for portability with their adapters. For instance, there's at least one model of MacBook

For me the biggest issue is that Apple went too far in trading utility for portability with their adapters. For instance, there's at least one model of MacBook Pro (from a few years back) that, when it's running flat out, drains its battery even when plugged in. I know that's a perfectly reasonable tradeoff for the many people who don't use the full power of their laptop most of the time, but for someone who wants to it's frustrating (especially since, so far as I can tell, there isn't even a more powerful adapter you can buy up to). I happen to prefer "the brick" Lenovo bundled with a comparable laptop. It does the job when plugged in (can charge the battery even if the laptop is going full blast) and there are adapters I can buy down to if I want something more portable.