I genuinely did not understand the ending, nor why people cried over this. (Probably because I'm a little slow in the head)
But this fanfic really left a nice impression of Machan for me, it shows truly how her character doesn't want to be forgotten, and in a way, the trainer can be portrayed as the fandom, who desperately doesn't want to forget her, and in the end it works, (I assume it's a good ending because trainer met Machan in the end, but pll say it's a bad ending, if anyone cares, please explain why it's a bad one!). This horse will truly get the love it deserved even after it's passing in real life, because it will forever stay in this amazing community's hearts.
That said, I too, will never forget you Aston Machan, with the rest of the people who show genuine love for you!