Love Plato- it’s so performant! I’ve always wondered why Kobo doesn’t just throw out what they’ve got and fork it.

While I do like Plato, it's got a lot of bugs and design issues... It can't handle epubs without chapters/really large chapters, it is noticeably worse on battery life than KOreader or the stock firmware, the amount of time taken to load the dictionary is proportional to the number of dictionaries, etc.