Clive,
Well, yes and no. Something will eventually kill Dreamweaver, but I seriously doubt it will be Drupal. We see these articles all the time: Ruby will kill Coldfusion. Rails will kill Coldfusion. Ruby-on-Rails will kill Coldfusion.
I know it sounds like I'm making this up. Try this link:
http://corfield.org/entry/On_Hal_Hel...on_and_Fusebox
Everyone's been shooting at it for years. And yet, people are still using Dreamweaver to write Coldfusion code to hit databases.
Theoretically, I would actually prefer it if the LAMP array dominated. I would much prefer open-source. But it's so wild west. One coder works on a project, then the next comes along and says "We have to change everything..."
Ed, you're going to find Dreamweaver is not cheap. You may wish to try Seamonkey, which is free and downloadable. Then, once you've gotten your feet wet, you can move on to Dreamweaver...
Thanks,
Bill