<i>The UTC time scale which currently serves as the basis for all civil time is defined to be calculated from UT1. If civilization continues to desire the use of mean solar time then UT1 will eventually fail to serve that need.</i><p><i>Within the next millennium the IAU will have to consider defining and naming a new version of UT to serve as the quantity which is measured by analemmatic sundials. A name for that time scale might perhaps be Analemmatic Universal Time (UTA).</i><p>ok. We better form a committee. We don't have much time.
Related:<p><i>GPS does not account for leap seconds (2002)</i> - <a href="https://news.ycombinator.com/item?id=33620933" rel="nofollow">https://news.ycombinator.com/item?id=33620933</a> - Nov 2022 (53 comments)
I'd not heard of TAI before, the page doesn't explain how it differs from Loran-C, though perhaps some of the reference links will. I'll have to check them out.