Yep, quite so. There is a lot of legacy cruft. There are even bugs in prior versions which have now become features[1]! [1]: https://en.wikipedia.org/wiki/A20_

Yep, quite so. There is a lot of legacy cruft. There are even bugs in prior versions which have now become features[1]! [1]: https://en.wikipedia.org/wiki/A20_line https://en.wikipedia.org/wiki/A20_line