I have a CTD about once every 12 times I play. Not often. It doesn't detract from my gameplay experience. It may bug the hell out of you, though.
If you mean supply as in not being able to spawn tanks when your town doesn't have a direct link to the supply lines, yes it is.
If you mean in-field supply, no.
If you mean being able to bomb a factory in Brussels and it limiting supply in let's say, Dinant, no.
All tanks are limited. Some more than others. you can have 3 non-mission Matilda II's and one extra Mission Matilda per firebase. I think it's similar at the army bases. you can have more s-35's and a-13's than that I think. Char's are limited also. Infantry, trucks, and AT guns are always availible.
If a town is contested, it cannot spawn tanks.
AI USUALLY rebuilds correctly now. It was bugged before and didn't rebuild. Framerates are much better in the air. Attacking an armybase bristling with 20mm flak 30's is very very scary. 20mm AA rounds do a lot of damage to a Blen and they dont' fly well on one engine.
Dropping 8 forty lb boms on a group of them from a blen I is very very fun and makes up for it though. hehe.
I don't quite understand the Blen IV bombsite. It's a wierd piece of machinery. There are instructions on using it in the online manual. I just don't care enough to learn to use it. If I get a good bombadier to multicrew with me, then A Blen IV is a force to be reconed with. An accurately dropped 250 lb bomb or 4 will ruin any axis dOOd's day.
I don't know. Any person that I know that isn't a total crybaby likes the game. It is still possible to get burnt out on it (just like anything). I had to take a breather and step back for a while myself. I came back, though, and love seeing my Close Air Support pave the way for the tank that I'm riding on. It's truly awesome.
As always, they are constantly adding shiznit and fixing bugs. It's a constantly improving beast. I think if they had an opportunity to release this version to the public instead of 1.11 then few people whould have left to begin with. But we would have lost a few even then. The system is complex and DOES NOT always work the way it's supposed to. Even when it does work right, it can piss you off because of a poor design decision. I tired playing a single player wwii sim the other day that I have sitting around (European Air War) and I kept thinking, "This is stupid, None of these machines is piloted by a real person. NONE OF THEM. They don't care that I shoot them down, they don't care that I strafed them, and it doesn't really matter that I did." I have just gotten used to the idea that me attacking a copse of trees or a base or anything that I see on the ground in enemy territory COULD have an effect on the war. Being part of something greater. You can't get that without the persistant world. You can't get that without massive multiplayer. I guess that's the part that I truly like about it.
Man, I am a fanboi. Oh well.