As far as I can tell, the nearest thing to a stated goal or mission is on their “About” page:

    Our main features are:

    * ReactOS is able to run Windows software
    * ReactOS is able to run Windows drivers
    * ReactOS looks-like Windows
    * ReactOS is free and open source

Building a replica of an old OS is a fun project, but if there was a purpose for it besides having an "is able to" replica, it would attract more people.

▲ squeefers 7 hours ago | parent [-]

in the real world, most people use windows. most software that those people use is written for windows. if it can run windows exes out of the box, whilst not phoning home to microsoft, it becomes an attractive proposition. i want to get off windows but i dont want the headache of linux; to me its the only hope

	▲	velcrovan 5 hours ago \| parent [-]
		Sure, but Windows has moved a long ways since the version that they're attempting to replicate. And again, their bar for success "is able to run Windows programs" is not actually high enough to achieve a practical Windows replacement, even if going back to Windows 95 is all we wanted. It's interesting you mention Linux being a headache — it is, but there is an order of magnitude more people working full-time on just the Linux desktop experience than have ever even tried running ReactOS. That ratio would have to flip before the latter has a hope of being a useful Windows replacement. We’re much more likely to see Wine able to run 100% of Windows before ReactOS gets there.