> The real problem lies at a more fundamental level. The holdover of borders from the X10 protocol is a mistake. Borders cause complications in the protocol, servers, and clients, but don’t provide enough payback to justify their existence.

> We can’t justify removing borders from the X protocol, given the large number of clients that would need modification. However, future window systems should let clients deal with window borders. Programmers using X11 should take care when performing geometry computations.