There has recently been some concerns expressed around new TLDs colliding with file extensions. While I’m the first to raise concerns around collisions, I think that this particular ship has sailed. As an example, the DEC VAX and CP/M used .COM as a file extension. This was then carried over into MS-DOS (and Windows) - a good example of this being command.com. While this confusion was briefly abused, but mitigations were quickly put in place....
Causes of DNS information hiding One of the recurring discussions in the ICANN NCAP (Name Collision Analysis Project) is what relevant information about the global DNS namespace can be extracted from the root servers. Increasingly the DNS hides information, both to improve end user privacy as well as to increase performance and reliably. QNAME Minimization Aggressive NSEC LocalRoot Caching Local Authoritative Summary Disclaimer Todo QNAME Minimization DNS Query Name Minimisation to Improve Privacy (originally published in 2016), only sends the minimum required part of the query name to the authoritative servers....