> But any property in joint names AUTOMATICALLY becomes the property of the joint owner and IS NOT subject to any restrictions

In common law jurisdictions, what happens upon death depends on whether the property was held under a joint tenancy [1] or tenancy in common [2].

[1] https://en.wikipedia.org/wiki/Concurrent_estate#Joint_tenanc...

[2] https://en.wikipedia.org/wiki/Concurrent_estate#Tenancy_in_c...