Are modern apps still locked to accounts in win 10? It really sucks you have to download several copies of an app to share use across acounts, it makes no sense, really.
Hey, do you mean using the same app across multiple accounts on the same PC? It might not seem like it, but I thought I'd clarify that you don't actually need to download multiple copies. The Store makes it looks like it's "downloading", but it's actually re-using the same cache for all users on a particular PC.
8.1 actually made things more efficient than 8.0 in this regard too - in 8 it would copy that app cache for each user, but in 8.1 it even shares the same local storage for each user (with different user storage for settings and saved data and such.
Are you guys using Win10 full time as a primary OS? Is it buggy?
The general rule is the same as ever: If you need to ask, don't install it.
Even if current preview builds seem stable, the Windows team has publicly stated that as new features are added in new builds, things may regress before they get better. For example, the September and October (2014) preview builds were stable, but the November build introduced a lot of new things which made it overall a lot less stable. There's no guarantee that won't happen again, so unless you're ready to deal with problems and have everything thoroughly backed up, definitely don't use Windows 10 previews on your main PC.