WotC's recent....behavior, coupled with what feels like a couple years of winding down and even death spiraling, inspired a recurrent thought to arise in my head with a bit more force than usual: Maybe I should consider Pathfinder?
I'm responding more to the thread title question than your own, but... as for myself, I find it silly to make gaming or purchasing decisions based on anything other than what I want to actually play.
I've enjoyed 3.5 and am still in an ongoing online 3.5 game. I imagine I might occasionally feel the urge to dabble back in it, but don't feel any need to get a new 'main' system - no when I'm enjoying the 4E games I'm in, and have plenty of ideas remaining for new ones, and have a bunch of other systems I'm either playing or want to play (Deadlands, Dark Heresy, Dragon Age, Dresden Files... apparently anything starting with the letter 'D', now that I see them all grouped together...)
Even if I did feel the need to go back to the system, I doubt I would feel the need to spend money and effort on something like Pathfinder - it seems a decent product, but it doesn't fix the main issues I have with the system, and so I'd rather stick with a system I know, where I can most easily use the content I already own.
Even if WotC started making completely insane decisions, if I'm enjoying the content I have now, it would seem petty to quit just out of spite. And right now, while I don't disagree with many decisions they've made, I can see the generally reasons behind them, and think that talk of madness and death spirals is pretty much the usual overblown reactions.
Time will tell, I suppose. But right now, as long as I enjoy the games I'm playing, I doubt any industry 'event' or 'news' could prove more important than that.