Article: https://www.japantimes.co.jp/life/2024/03/16/style-design/on-design-transportation-recycling-boeing/
More info here: https://www.japan-guide.com/blog/raina/180819.html
There are so many YouTubers talking about this. This YouTuber in particular (がみ) apparently managed to ride the first train from Kanazawa:
https://www.youtube.com/watch?v=5WVRZLWj6rs
This also marks the end of their previous limited express trains, Thunderbird