While I do agree, this stuff is vastly more complex then just what the OP said. But funnels are nothing more then how many people did Y after X. If you record

While I do agree, this stuff is vastly more complex then just what the OP said. But funnels are nothing more then how many people did Y after X. If you record everything (say every single web request) you could easily do a query to find out that type of data and shove it in a table.