Suppose we set aside the concerns in this thread about the legitimacy of this.

How would this work when the old hardware inevitably needs to be serviced (mechanical hard drive failure, memory errors, dust buildup, etc)?

Would they have technicians on-site available to service whatever random laptop you send them? If your laptop dies do they ship it back to you so you can fix it and send it back?

Or what if you bork the OS by accident? Will their KVM solution allow you to upload an ISO and plug it in over some USB drive emulation?