The XCR is outselling the M96 by miles already, and it hasn't even been on the market that long. That much is obvious just by looking at the buzz about them on the internet, on their own forum... we could take a poll right here. Everyone who owns one or the other, check the one that you own.
If you are that worried about it, you can buy unlimited volumes of spare parts right now, today. And I will do exactly that.
Not only that, you *can* buy M96 parts today if you can demonstrate that you actually need them. i.e., if your bolt is broken, you can mail it to RA and they will send you a new one. Granted they don't make the parts anymore, so they are trying to reserve them for people who actually need them. I can appreciate that under the circumstances.
Only the most popular platforms of all time are truly supported through the course of several decades anyway. Every company out there has, at one time or another, made something and then discontinued it.
Enough of my XCR plug though.
FN SCAR. I hope they make it. I would buy a real version.