Macs really do crash less than PCs. They are better at recovering from a conflict of resources (often transparently, meaning the user has no idea a problem has occurred), due to better and more efficient management of said resources. MacOSX onwards was always a true multi-user operating system (it is a flavour of Unix/BSD after all) and for that reason it multitasks better than Windows and is more capable of sharing out memory is such a way that deadlock is avoided.

There's a reason that "Windows" has become synonymous with "bluescreen", whilst the Mac "bombs" are something that very few people would immediately associate with MacOS.