I have a .science domain and a .com domain.
Even though .science was launched in 2014 (more than a decade ago), I still consider it a non-standard TLD and still deal regularly with difficulties around its use. (For instance, you wouldn't believe how many online services reject email addresses than end in .science because they use regexes that exclude TLDs with 7 letters.)
Likewise, I've registered .lol and .fun domains but never would have assumed that just because they're available now, they will be available in perpetuity.
In that sense, .name as a third-level TLD is even more non-standard, because the standard way domain registration works is by choosing a single "second level" domain name, then adding subdomains.
My insurance will not send emails to my [email protected] domain. Neither will several other systems. A number of systems flat out refuse to acknowledge that such a tld exists. (Improper assumptions about valid email addresses)
> Likewise, I've registered .lol and .fun domains but never would have assumed that just because they're available now, they will be available in perpetuity.
Why wouldn't you assume this?
> the standard way domain registration works is by choosing a single "second level" domain name, then adding subdomains
The entire ccTLD systems of the UK, China, Germany, France, Japan, and many others would beg to differ.