I’m a third grade dropout but doesn’t this mean that in the future, total solar eclipses will no longer be total?
You are correct!
Stop by my office after school and I’ll give you your 3rd grade diploma ... with an attached degree in astrophysics! :)
The answer to this is yes, we live in a unique era when the 'visual diameter' of the Moon/Luna as seen from the Earth's surface matches the same 'visual diameter' of our sun, Sol. In earlier eras (pre-human), the eclipses would have lasted longer, been less spectacular and been more frequent with a closer Lunar Orbit (annular Lunar Eclipses would have been 'full').
Per this article from The Popular Mechanics website, the ending of total Solar Eclipses will be a comfortable 563 million years in the future, at a minimum.