The sky is not falling. Companies will not lose their trademark if they fail to register the domain in all possible TLD's and/or register and maintain a TLD. C

The sky is not falling. Companies will not lose their trademark if they fail to register the domain in all possible TLD's and/or register and maintain a TLD. Considering the latter requires becoming a registrar, you are essentially asserting that owning a trademark effectively requires every company to enter the domain business. That assertion is absurd.