Why backwards compatibility shouldn't be a afterthought

There is a world of diverse gaming titles from older generation ps game systems, particularly PS1 &  PS2 and more so when you consider all regions. Its fair to say that it has not been capitalized on so far, this brings us to the business case for it. People will pay for something they know is worth thier money, unlike some newer games where most of the time the experience is sub-par. Much like a HD re-release of a well known title would sale pretty well. Sony must do more to embrace backwards compatibility by having a large line up of titles of all regions and engaging with well known developers to make it happen for current and future gamers.