They decided they didn't want it to be a success. They priced it up as a high end smartphone when it isn't, and refused to release it in key markets (for example it's not on offer in; UK, Germany, France, India, USA). It has not place in their strategy anymore so they've killed it. As much as I would love to have one it's an absolute waste of money to buy.
I used to think so too: that they were deliberately "burying" it, but now I'm beginning to see the logic behind it: the markets they released it in are markets where a. Nokia still have very strong brand loyalty, b. where Android/iOS don't yet have huge market penetration, and c. still emerging markets. They have a higher chance of getting Meego to catch on in those markets, and lure in a bunchload of new users and, more importantly, new developers.
As far as whether or not app support is important, well, I've been using the Pre 3 and the Desire Z about the same for the past month or so, and I can honestly say that the only apps I miss when I'm using the Pre 3 are:
a. an MSN messenger app (there's plenty that support it on the app catalogue, but no free ones)
b. a We7 app, for free music streaming.
c. Google Maps (there are maps included on the Pre 3, but Google's are better)
OK, maybe a Soundhound app too, but I don't honestly use it more than occasionally, wouldn't call it a killer feature...

ESexplorer too, especially for copying files to and from my PC over wifi, but there's probably a decent free (or at least cheap) file manager available for WebOS too, I just haven't found it yet.
So as far as the OP goes, unless you have some 3rd-party app that's really a must-have feature for you, I don't think you'll find being on Meego too onerous. I wouldn't rely on the Alien Dalvik port either, as most "real" Android apps (ie. the ones that have some actually noteworthy functionality rather than just being pre-packaged websites) use native code, and Alien will only run apps written exclusively in Java. Don't worry too much about running Android apps though, cause going by how enthusiastic a hacking community gathered around the N900, I'm betting there'll actually be a lot of cool little things coming out for Meego if you're prepared to dig on enthusiast forums rather htan just rely on the Ovi store.
The phone is undoubtedly spectacular though, the button-free UI looks very convenient and intuitive (it's part of what drew me to WebOS, but Meego seems to perfect it), so for me the only downside is that it's a bit expensive since you can't get it on contract.