They just followed the logic. which used to be the best approach? the multi layer approach, they "followed" that. Which used to be the fastest ORM? Dapper, so, it might just be, let's continue using it.

Blazor is indeed very interesting. If it was launched before I had to learn javascript I would probably never learn it. But I kinda like it now (javascript) it is messy in a beautifull way :-D