"We would also appreciate input on the total number of TLDs that could be delegated without negative impact to root server performance."Honorable "new gTLD Boss" and ICANN CTO gave answers and I stopped on that section of a paragraph:
"There are also technical limits placed on capacity by the systems that handle root zone provisioning (operated by PTI as JANA Functions Operator and Verisign as Root Zone Maintainer)..."Actually, I fell from my chair and broke two legs.
Verisign is the registry for ".com" domain name and has shown signs that new gTLDs were impacting its business: the more new domain name extension spread online, wider is the choice and - unless I am wrong - this reduces the choice to register a ".com" domain name.
I didn't know that the technical infrastructure of domain names relied on Verisign too but I believe that this could be used as a technical reason not to push for another round of new gTLDs.