Comment by r_hoods_ghost

No they probably do mean the jump between the interface in 2.49 which was somewhat unique and very, very different to the current UI, to that in 2.5 which the current interface mostly resembles. 2.8 was a smaller jump that introduced left click select as the default, along with various cosmetic enhancements and a rework of the depsgraph.No idea what you're talking about with contexts being selected in the middle of the screen etc. I suspect you're using "context" in a way unique to you