The second biggest difference is that the internet has changed the nature of debugging. You used to follow the program all the way through on your local machin

The second biggest difference is that the internet has changed the nature of debugging. You used to follow the program all the way through on your local machine and interrogate all the variables. Now, you're debugging across the client and the server. I think that is one of the reason unit testing has taken off. It is much harder to know where something happened. The third biggest difference is that languages can be a lot more complicated because documentation is searchable so you can have a lot of functions that do the things you might have written yourself.