I've used Netscape too for years, but it began to show it's age a year back. It also locked up a LOT.
I never really liked netscape v6.0 so I caved in and started using IE.
But if Mozilla is any good I see no reason why I wouldn't switch back.
Is it any good? Is it finally stable? (this was my biggest problem I had with Netscape - it crashed like you wouldn't believe. IE hasn't crashed on me once!)