There was a time when all keyboards used mechanical switching. Meaning they had springs to provide the up and down movement and pieces of metal to make the electrical contact. Then membrane technology using rubber domes was developed and provided a way to make keyboards very cheaply. Computer manufacturers, ever cost conscious, moved to the new technology for the most part.
But mechanical switches never went away entirely and in the early years of the 21st century people began to realise that the whole typing sensation was somehow improved by the old fashioned technology and through user groups and community websites the popularity of mechanical rocketed. Especially amongst super users, gamers and anyone who typed a lot as part of their work or play.
Now it is back to stay and many manufacturers are very committed to using mechanical switches in their products and many users would not consider anything else.
At the forefront of this renaissance were manufacturers like Filco and Das Keyboard.
