I doubt they'll drop backward compatibility anytime soon ( although, not sure how the new iteration of AS will look like -> they are mentioning something about a smoother transition than form AS 2.0 to AS 3.0, but that's not really enough ). I personally think you've been just lucky all this time... freelancing and carefully chosen clients gave you the chance to keep on using something you're familiar with and not have to change your habits or learn anything ( significant stuff ) for years.

... but with your current skills, if freelancing were to not be an option for you anymore, you'll be a sitting duck. Your ActionScript 2.0 experience is obsolete, no company ( or a negligible number - people maintaining a really old code base ) is looking for people with AS 2.0 experience these days.

From your replies, it's also quite clear that you're not a programmer, you haven't got a background in programming ( like a degree that would take you through a few things you've most likely not even hear of ). Also calling AS 2.0 and what you've built for yourself ( "your way" ) over time "practical" is completely subjective... and quite silly. Don't get me wrong, I'm not trying to offend you, great for you that you've survived so far on AS 2.0 ( and I do hope you'll do fine in the future too ), but the problem is that you clearly have no understanding of AS 3.0 and OOP, so of course your conclusions and comparisons are flawed.

HaXe in my humble opinion is a complete waste of time. You'd be really better off learning AS 3.0 and more importantly, OOP and good programming practices in general.

That being said: if you're happy with your current setup and lifestyle, great for you! AS 2.0 will most likely not get dropped suddenly ( as jAQUAN has already pointed out: there are quite a few applications still written in AS 1.0 or 2.0 on the web... Adobe executives / managers have to be extremely dumb to drop backward compatibility anything soon ), but you're far from competitive in the field... your lack of real programming experience and that you've never worked in a team ( do please correct me if I'm wrong ) just put you in a really bad position on the market. If you want to stick with this technology, you'll eventually need to learn AS 3.0 ( even if you say "f*ck mobile" now, just give it 1-2 more years and you'll find yourself badly regretting those words ), OOP and start shifting towards Game Developer ( or Enterprise Application Development which will kinda require Flex ).

Projector is obsolete in my eyes and it's just a matter of time until Adobe will stop supporting it and wasting time making it work for never versions of windows and what not. You want to develop for the desktop? Then Adobe Air is the way to go... fight it if you want, but you'll eventually just lose the fight.