How heavily do you use box-sizing and display: table (table-cell)?

Question

css

How often do you use box-sizing and display: table (table-cell)? And other properties from CSS3

Answer 1

display: table(row/cell) - only as a hack in specific cases.
box-sizing: border-box - has become almost standard lately

Answer 2

others - often, these - never.

Answer 3

Often. Well, if in more detail, then a box-sizinglittle more than in each layout, the second is 50/50.