Old terminals like VT-100 actually used control function or control sequences and it is still today much widely supported by terminal emulators like xterm. The Linux console also implements a large number of terminal controls. Windows has also some type of support for Terminal Sequences.
ECMA-48 has standardized the Control Functions to a great extent.
Actually how much widely supported and implemented are these control sequences across different terminals, terminal emulators, shells, consoles or similar text interfaces?
How much of the standard is going to be implemented widely in different terminal emulators, shells, consoles?
How much often or wide developers rely on these control functions when building console applications in C89?
What are the great alternatives that are recommended instead of using control sequences when building console applications assuming code is developed in C89?